US3236244A - Tobacco smoke filter element - Google Patents

Tobacco smoke filter element Download PDF

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Publication number
US3236244A
US3236244A US139059A US13905961A US3236244A US 3236244 A US3236244 A US 3236244A US 139059 A US139059 A US 139059A US 13905961 A US13905961 A US 13905961A US 3236244 A US3236244 A US 3236244A
Authority
US
United States
Prior art keywords
smoke
flavoring agent
filter element
tobacco
adsorptive material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US139059A
Other languages
English (en)
Inventor
Jr Richard M Irby
Edward S Harlow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brown and Williamson Holdings Inc
Original Assignee
American Tobacco Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL282359D priority Critical patent/NL282359A/xx
Application filed by American Tobacco Co filed Critical American Tobacco Co
Priority to US139059A priority patent/US3236244A/en
Priority to ES280230A priority patent/ES280230A1/es
Priority to GB32845/62A priority patent/GB951510A/en
Priority to FR908471A priority patent/FR1352129A/fr
Priority to LU42324D priority patent/LU42324A1/xx
Priority to DE19621517242 priority patent/DE1517242A1/de
Priority to JP37039699A priority patent/JPS5122080B1/ja
Priority to CH1101162A priority patent/CH407846A/fr
Application granted granted Critical
Publication of US3236244A publication Critical patent/US3236244A/en
Priority to FI0785/69A priority patent/FI43402B/fi
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/281—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed
    • A24B15/282—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed by indirect addition of the chemical substances, e.g. in the wrapper, in the case
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
    • A24D3/163—Carbon

Definitions

  • the adsorbed flavoring agent when made a component of a filter element, is selectively and progressively eluted by the particulate matter in the smoke and not by the nicotinic constituents of the smoke, with the result that the flavoring agent is released in proportion to the amount of smoke passing through the filter element and that the undesirable volatile constituents of the smoke are adsorbed by the adsorptive material in the same manner as if the volatile flavoring agent were not present in the adsorptive material.
  • the adsorptive material is made to function as such by dispersing it throughout a carrier base rather than as an absorptive mass of the material pursuant to the aforementioned French patent.
  • the volatile smokeflavoring agent such for example as menthol
  • the adsorbed flavoring agent is held so effectively by the adsorptive material that there is no significant release of the flavoring agent from the adsorptive material, by volatilization or otherwise, during extensive period of storage.
  • a filter element of our invention containing adsorbed menthol does not evidence the characteristic odor of the flavoring agent.
  • the elution of the volatile smoke-flavoring agent from the adsorptive material when used as a tobacco smoke filter element pursuant to our invention appears to be effected by the particulate matter in the smoke.
  • This particulate matter consists to a large extent of minute droplets of semi-liquid material. When any of these droplets come into contact with the adsorptive material in our filter element, they are adsorbed and the resutling heat of adsorption, supplemented by the heat of adsorption of vapor phase constituents by the same adsorptive material in our filter element, causes a significant amount of vaporization of the adsorbed flavoring agent.
  • the filtered smoke contains a uniform amount of the flavoring agent and hence possesses a uniform taste throughout the entire smoking life of the cigarette.
  • our novel filter element for tobacco smoke comprises a carrier base in which there is substantially uniformly dispersed a finely divided adsorptive material having adsorbed thereon a volatile smoke-flavoring agent capable of being selectively eluted from the adsorptive material by the tobacco smoke.
  • the adsorptive material used in practicing our invention may be any finely divided solid material which acts as an adsorbent.
  • Activated carbon and charcoal obtain-e d from a petroleum base or from coconut shells, pecan hulls, wood, or the like, silica gel, zeolites and chabazites are examples of such useful materials.
  • silica gel, zeolites and chabazites are examples of such useful materials.
  • activated carbon we presently prefer to use activated carbon because of its outstanding capacity for adsorbing volatile smoke-flavoring agents.
  • All of these adsorptive materials are also capable of removing from tobacco smoke such volatile constituents as acetaldehyde, isoprene, acrolein, acetone, methyl alcohol, methyl furan, furan, isobutyraldehyde, methyl acetate, and the like.
  • the volatile smoke-flavoring agent comprises any one or more of those conventionally used for the purpose of flavoring tobacco smoke and include, for example, menthol, vanillin, benzaldehyde, spearmint oil, peppermint oil, oil of cloves, cardamon oil and ethyl valerate.
  • menthol vanillin
  • benzaldehyde spearmint oil
  • peppermint oil oil of cloves
  • cardamon oil and ethyl valerate e.g., peppermint oil
  • a composite flavoring agent which is normally composed of a mixture of compounds
  • spearmint oil we have found that the elution of the flavoring agent from the adsorptive material favors the release of the more volatile compounds and, therefore, of the more characteristic flavor of the agent.
  • the result is a fresher and cleaner taste than when all of the compounds in such a composite flavoring agent are volatilized from the adsorptive material.
  • Adsorption of the flavoring agent is effected by any of the conventional adsorption techniques.
  • adsorption is advantageously effected from a highly saturated solution of the flavoring agent in its solvent.
  • the degree of saturation of this solution can be enhanced by the use of solvent pairs; for example, We have found it advantageous to effect adsorption of menthol on activated carbon by forming a substantially saturated solution of the menthol in ethyl alcohol containing from 5 to 50% by volume of water, the water content of the solvent mixture limiting the solvent capacity of the alcohol for the menthol, and by then adding the carbon to the menthol solution for a period of time suificient to obtain adsorption of the menthol by the carbon.
  • adsorption of the flavoring agent by the adsorptive material is also elfectively accomplished by exposing the adsorptive material to vapors of the flavoring agent or to the pure flavoring agent in liquid form.
  • adsorption of the flavoring agent by any of the foregoing procedures can be effected after the adsorptive material has been dispersed in the carrier base, we have found that most satisfactory results are obtained by effecting the adsorption before incorporating the adsorptive material in the carrier base.
  • the carrier base useful in practicing our invention comprises any of the materials conventionally used as filter elements for tobacco smoke.
  • these materials are cellulosic or polymeric and are in the form of sheet, filament or sponge-like mass, and include shredded or finely-cut tobacco itself.
  • the adsorptive material is incorporated in or coated on these carrier bases, advantageously as uniformly as possible, in such manner as to retain their adsorptive characteristic.
  • activated carbon can be distributed in a sheet of cellulosic fibrous material as described in the United States Patent to Schur and Hillsman No. 2,801,638. According to the procedure of this patent, activated charcoal is added to a so-called high alpha cellulose pulp of commerce, and the resulting mixture is formed into a sheet by conventional papermaking processes and equipment.
  • a sheet or shreds of such fibrous material can be appropriately impregnated with the adsorbent by immersing the sheet or shreds in, or spraying it with, a slurry of the adsorbent.
  • Suitable adsorbent-containing base materials can also be prepared by brushing or dusting the adsorbent on the carrier base, either with or without the use of a carrier base additive which enhances its retention of the adsorptive material.
  • the carrier base with its contained adsorptive material it is made into a filter element by any conventional technique appropriate to the form and composition of the base material.
  • Control of the amount of flavoring agent imparted to the tobacco smoke may be effected by several expedients.
  • the various adsorbent materials mentioned heretofore have different capacities for adsorbing the flavoring agent, and hence the amount of adsorbed flavoring agent available for transfer to the smoke can be controlled by the choice of adsorbent material.
  • the various adsorbent materials mentioned heretofore have different capacities for adsorbing the flavoring agent, and hence the amount of adsorbed flavoring agent available for transfer to the smoke can be controlled by the choice of adsorbent material.
  • the various adsorbent materials have different capacities for adsorbing particulate matter and volatile constituents from the smoke, with the result that different amounts of heat of adsorption are generated with attendant variation in the rate at which the flavoring agent is volatilized for incorporation in the smoke.
  • the amount of any adsorptive material dispersed in the carrier base can be varied, or the length of the filter element containing the flavoring agent-treated adsorptive material can be varied, so as to alter the amount of flavoring agent transferred to the smoke as it passes through the filter element.
  • the resulting decrease in the amount of smoke through the filter increases the extent of adsorption of particulate matter by the adsorptive material, but although this may result in the generation of more heat of adsorption with attendant increase in volatilization of the flavoring agent there is also less particulate matter passing out of the filter and hence less flavoring agent carried from the filter.
  • Further control over the amount of flavoring agent-containing particulate matter reaching the smokers mouth can be obtained by adding a mechanical filter element, such as a cellulosic plug, to the cigarette adjacent the discharge end of the flavoring filter element of our invention.
  • the amount of adsorbed flavoring agent which should be available for transfer to the tobacco smoke will vary with the amount of tobacco in the cigarette and upon the flavoring strength of the agent. In general, We have found that the amount of flavoring agent-treated adsorptive material just suflicient to impart the desired flavor to the smoke throughout the smoking life of a cigarette is less than that amount of adsorptive material required for removal of the adsorbable volatile constituents present in the smoke from the cigarette. Accordingly, if a greater degree of adsorption of these volatile constituents is desired, the filter element of our invention can be supplemented with an additional component composed of untreated adsorptive material in order to obtain the required amount of reduction in concentration of volatile constituents without wasting excess flavoring agent.
  • EXAMPLE I The following specific example is illustrative of the production of a filter element of our invention using menthol as the smoke-flavoring agent and activated carbon as the adsorptive material.
  • menthol was dissolved in 1.4 gallons of a 50-50 (by volume) mixture of ethyl alcohol and water. The resulting solution was substantially completely saturated with respect to the menthol.
  • One pound of petroleum base activated carbon was ground to a size. such that a major portion of it passed through a .200 mesh (Tyler Standard) screen and a significant portion passed through a 325 mesh screen. The ground carbon was then added to the menthol solution and the resuelting mixture was agitated at room temperature for two hours.
  • the carbon with its adsorbed menthol was separated by filtration and was washed three times with 20% by volume alcohol (balance Water).
  • the Washed carbon was thereafter dried for 20 minutes in an oven maintained at 220 F.
  • the resulting product consisted of activated carbon containing adsorbed menthol.
  • This carbon product was then dispersed in a cellulosic carrier base by adding it toan aqueous pulp of high alpha cellulose in the amount of about 25 parts by weight of canbon to 75 parts of the pulp on a solids basis. After thorough mixing of the charcoal and pulp in the furnish, the pulp was formed by conventional paper-making technique into paper sheet Weighing about 16 grams per square meter.
  • the paper was crumpled and formed into a filter element by the procedure described in the aforementioned Schur and Hillsman patent.
  • the resulting filter element comprised a cellu-losic carrier base having dispersed therein activated carbon containing adsonbed menthol.
  • the representative filter element of our invention imparted 0.2-0.3 milligram of menthol to the smoke of the cigarette when smoked according to generally accepted smoking procedure, that is, smoking 47 millimeters of the cigarette and taking one pufi per minute each of two seconds duration and of 35 milliliters volume.
  • similar filter elements impart from 0.2 to 0.6 milligram of menthol to the smoke of each cigarette when tested according to this procedure.
  • volatile smoke-flavoring agents in the smoke filter element of our invention
  • the volatile agent adsorbed by the adsorptive material may comprise any other inhalant having beneficial properties such, for example, as antihistamines, decongestants, and the like.
  • the term volatile smoke-flavoring agent as used herein and in the claims must be understood to include any volatile substance the inhalation of which enhances the smoke or is otherwise beneficial to the smoker.
  • a unitary wrapped smoking article comprising a main portion consisting essentially of tobacco and a filter portion at one end thereof including a filter element for smoke capable of adsorbing undesirable constituents of tobacco smoke, said filter element comprising a carrier base, a finely divided adsorptive material uniformly dispersed in the carrier base and a volatile smoke-flavoring agent adsorbed on the adsorptive material, substantially all of the content of said flavoring agent in the article being on the said adsorptive material where, when the article is smoked, it is away from the destructive effect of the heat of combustion of the tobacco, the flavoring agent being held on the adsorptive material by adsorptive forces and being selectively and progressively elutable from the adsorptive material by the particulate matter in the tobacco smoke and thus releasable to the smoke substantially in proportion to the amount of smoke passing through the filter element, the adsorptive material associated with the flavoring agent being further capable of adsonbing undesirable constituents of the tobacco smoke.
  • a unitary wrapped smoking article comprising a main portion consisting essentially of tobacco and a filter portion at one end thereof including a filter element for smoke capable of adsorbing undesirable constituents of tobacco smoke, said filter element comprising a carrier base, finely divided activated carbon uniformly dispersed in the carrier base and a volatile smoke-flavoring agent adsorbed on the activated carbon, substantially all of the content of said flavoring agent in the article being on the activated carbon where, when the article is smoked it is away from the destructive effect of the heat of combustion of the tobacco, the flavoring agent being held on the activated carbon by adsorptive forces and being selectively and progressively elutable from the activated carbon by the particulate matter in the tobacco smoke and thus releasable to the smoke substantially in proportion to the amount of smoke passing through the filter element, the activated carbon associated with the flavoring material being further capable of adsorbing undesirable constituents of the tobacco smoke.
  • a unitary wrapped smoking article comprising a main portion consisting essentially of tobacco and a filter portion at one end thereof including a filter element for smoke capable of adsorbing undesirable constituents of tobacco smoke, said filter element comprising a carrier base consisting of paper, finely divided activated carbon uniformly dispersed in the paper and a volatile smokeflavoring agent adsorbed on the activated carbon, substantially all of the content of said flavoring agent in the article being on said activated carbon where, when the article is smoked, it is away from the destructive effect of the heat of combustion of the tobacco, the flavoring agent being held on the activated carbon by adsorptive forces and being selectively and progressively elutable from the activated carbon by the particulate matter in the tobacco smoke and thus releasable to the smoke substantially in proportion to the amount of smoke passing through the filter element, the activated carbon associated with the flavoring agent being further capable of adsorbing undesirable constituents of the tobacco smoke.
  • a unitary wrapped smoking article comprising a main portion consisting essentially of tobacco and a filter portion at one end thereof including a filter element for smoke capable of adsorbing undesirable constituents of tobacco smoke, said filter element comprising a carrier base consisting of cellulose material, finely divided activated carbon uniformly dispersed in the cellulose material and menthol adsorbed on said activated carbon, substantially all of the content of said menthol in the article being on said activated carbon where, when the article is smoked, it is away from the destructive effect of the heat of combustion of the tobacco, the menthol being held on the activated carbon by adsorptive forces and being selectively and progressively elutable from the activated carbon by the particulate matter in the tobacco smoke and thus releasable to the smoke substantially in proportion to the amount of smoke passing through the filter element, the activated carbon associated With the menthol being further capable of adsorbing undesirable constituents of the tobacco smoke.
  • a unitary wrapped smoking article comprising a main portion consisting essentially of tobacco and a filter portion at one end thereof including a filter element for smoke capable of adsorbing undesirable constituents of tobacco smoke, said filter element comprising a finely divided adsorptive material uniformly dispersed in the filter portion and a volatile smoke-flavoring agent adsorbed on the adsorptive material, substantially all of the content of said flavoring agent in the article being on the said adsorptive material where, when the article is smoked, it is away from the destructive effect of the heat of combustion of the tobacco, the flavoring agent being held on the adsorptive material by adsorptive forces and being selectively and progressively elutable from the adsorptive material by the particulate matter in the tobacco smoke and thus releasable to the smoke substantially in proportion to the amount of smoke passing through the filter element, the adsorptive material associated with the flavoring agent being further capable of adsorbing undesirable constituents of the tobacco smoke.
  • a unitary wrapped smoking article comprising a main portion consisting essentially of tobacco and a filter portion at one end thereof including a filter element for smoke capable of adsorbing undesirable constituents of tobacco smoke, said filter element comprising a finely divided adsorptive material uniformly dispersed in the filter portion and a volatile smoke-flavoring agent adsorbed on the adsorptive material, substantially all of the content of said flavoring agent in the article being on the said adsorptive material where, when the article is smoked, it is away from the destructive effect of the heat of combustion of the tobacco, the flavoring agent being held on the adsorptive material by adsorptive forces and being selectively and progressively elutable from the adsorptive material by the particulate matter in the tobacco smoke and thus releasable to the smoke substantially in proportion to the amount of smoke passing through the filter element, the adsorptive material associated With the flavoring agent being further capable of adsorbing undesirable constituents of the tobacco smoke, the filter element further containing adsorptive material free

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
US139059A 1961-09-19 1961-09-19 Tobacco smoke filter element Expired - Lifetime US3236244A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
NL282359D NL282359A (it) 1961-09-19
US139059A US3236244A (en) 1961-09-19 1961-09-19 Tobacco smoke filter element
ES280230A ES280230A1 (es) 1961-09-19 1962-08-23 Un dispositivo de filtro capaz de absorber los constituyentes volátiles indeseables del humo del tabaco
GB32845/62A GB951510A (en) 1961-09-19 1962-08-27 Improvements in tobacco smoke filter element
FR908471A FR1352129A (fr) 1961-09-19 1962-09-03 élément de filtre pour la fumée du tabac
LU42324D LU42324A1 (it) 1961-09-19 1962-09-07
DE19621517242 DE1517242A1 (de) 1961-09-19 1962-09-12 Filterelement
JP37039699A JPS5122080B1 (it) 1961-09-19 1962-09-15
CH1101162A CH407846A (fr) 1961-09-19 1962-09-18 Elément filtrant et procédé pour sa fabrication
FI0785/69A FI43402B (it) 1961-09-19 1969-03-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US139059A US3236244A (en) 1961-09-19 1961-09-19 Tobacco smoke filter element

Publications (1)

Publication Number Publication Date
US3236244A true US3236244A (en) 1966-02-22

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Application Number Title Priority Date Filing Date
US139059A Expired - Lifetime US3236244A (en) 1961-09-19 1961-09-19 Tobacco smoke filter element

Country Status (10)

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US (1) US3236244A (it)
JP (1) JPS5122080B1 (it)
CH (1) CH407846A (it)
DE (1) DE1517242A1 (it)
ES (1) ES280230A1 (it)
FI (1) FI43402B (it)
FR (1) FR1352129A (it)
GB (1) GB951510A (it)
LU (1) LU42324A1 (it)
NL (1) NL282359A (it)

Cited By (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3390686A (en) * 1965-12-21 1968-07-02 American Tobacco Co Tobacco smoke filter element
US3410275A (en) * 1965-03-30 1968-11-12 Irwin W. Tucker Cigarette filter
US3473539A (en) * 1965-02-03 1969-10-21 Brown & Williamson Tobacco Bonded filter rod for smoking articles
US3575180A (en) * 1968-08-07 1971-04-20 H 2 0 Filter Corp The Water-reactive filter element for smoking devices
US3584630A (en) * 1969-08-20 1971-06-15 Philip Morris Inc Tobacco product having low nicotine content associated with a release agent having nicotine weakly absorbed thereon
US3603319A (en) * 1968-12-13 1971-09-07 Philip Morris Inc Flavor-releasing smoking article and method of making the same
US3636957A (en) * 1971-03-05 1972-01-25 Charles M Saffer Jr Cigar smoke filter and method for improving the quality of cigar smoke
DE2747775A1 (de) * 1976-10-28 1978-05-03 Olin Corp Aromatisierte zigarette
US4793365A (en) * 1984-09-14 1988-12-27 R. J. Reynolds Tobacco Company Smoking article
US4827950A (en) * 1986-07-28 1989-05-09 R. J. Reynolds Tobacco Company Method for modifying a substrate material for use with smoking articles and product produced thereby
EP0342538A2 (en) * 1988-05-16 1989-11-23 R.J. Reynolds Tobacco Company Smoking article with improved means for delivering flavorants
US4966171A (en) * 1988-07-22 1990-10-30 Philip Morris Incorporated Smoking article
US4991606A (en) * 1988-07-22 1991-02-12 Philip Morris Incorporated Smoking article
EP0482587A1 (en) * 1990-10-22 1992-04-29 Kimberly-Clark Corporation Flavor release material and method of manufacturing same
US5115823A (en) * 1990-12-20 1992-05-26 Philip Morris Incorporated Flavor-enhancing smoking filter
US5137034A (en) * 1988-05-16 1992-08-11 R. J. Reynolds Tobacco Company Smoking article with improved means for delivering flavorants
US5275859A (en) * 1992-12-21 1994-01-04 Eastman Kodak Company Tobacco smoke filter
US5345951A (en) * 1988-07-22 1994-09-13 Philip Morris Incorporated Smoking article
US5360023A (en) * 1988-05-16 1994-11-01 R. J. Reynolds Tobacco Company Cigarette filter
US5404890A (en) * 1993-06-11 1995-04-11 R. J. Reynolds Tobacco Company Cigarette filter
US5443560A (en) * 1989-11-29 1995-08-22 Philip Morris Incorporated Chemical heat source comprising metal nitride, metal oxide and carbon
US20030159703A1 (en) * 2002-02-22 2003-08-28 Zuyin Yang Flavored carbon useful as filtering material of smoking article
US20040016436A1 (en) * 2002-07-26 2004-01-29 Charles Thomas Adsorbents for smoking articles comprising a non-volatile organic compound applied using a supercritical fluid
WO2004041007A2 (en) 2002-10-31 2004-05-21 Philip Morris Products S.A. Electrically heated cigarette including controlled-release flavoring
US20040231684A1 (en) * 2003-05-20 2004-11-25 Zawadzki Michael A. Smoking article and smoking article filter
US20050000531A1 (en) * 2001-11-09 2005-01-06 Xuling Shi Method and composition for mentholation of charcoal filtered cigarettes
US20050066982A1 (en) * 2003-09-30 2005-03-31 Clark Melissa Ann Filtered cigarette incorporating an adsorbent material
US20050076927A1 (en) * 2001-12-18 2005-04-14 Adolf Schluter Ventilated smoking article
US20050172976A1 (en) * 2002-10-31 2005-08-11 Newman Deborah J. Electrically heated cigarette including controlled-release flavoring
WO2005082180A2 (en) * 2004-02-27 2005-09-09 British American Tobacco (Investments) Limited Smoking article and apparatus and process for manufacturing a smoking article
US20060090769A1 (en) * 2004-11-02 2006-05-04 Philip Morris Usa Inc. Temperature sensitive powder for enhanced flavor delivery in smoking articles
US20060130861A1 (en) * 2004-12-22 2006-06-22 Philip Morris Usa Inc. Flavor carrier for use in smoking articles
WO2007033272A1 (en) 2005-09-14 2007-03-22 R. J. Reynolds Tobacco Company Filtered smoking article
US20070084476A1 (en) * 2005-10-18 2007-04-19 Philip Morris Usa Inc. Reconstituted tobacco with bonded flavorant, smoking article and methods
US20070102012A1 (en) * 2003-04-09 2007-05-10 Philip Morris Usa Inc. On line formation of recessed cigarette filter
US20070186945A1 (en) * 2005-12-29 2007-08-16 Philip Morris Usa Inc. Smoking article with improved delivery profile
US20070215168A1 (en) * 2006-03-16 2007-09-20 Banerjee Chandra K Smoking article
US20070267033A1 (en) * 2006-02-09 2007-11-22 Philip Morris Usa Inc. Gamma cyclodextrin flavoring-release additives
US20080017206A1 (en) * 2005-09-30 2008-01-24 Philip Morris Usa Inc. Menthol cigarette
US20080017204A1 (en) * 2006-07-12 2008-01-24 Philip Morris Usa Inc. Smoking article with impaction filter segment
US20080035162A1 (en) * 2006-08-08 2008-02-14 Philip Morris Usa Inc. Smoking article with single piece restrictor and chamber
US20080083672A1 (en) * 2006-10-10 2008-04-10 Xing Dong Adsorbent composition and method of making same
US20080163877A1 (en) * 2006-12-29 2008-07-10 Philip Morris Usa Inc. Smoking article with concentric hollow core in tobacco rod and capsule containing flavorant and aerosol forming agents in the filter system
US20080216848A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Smoking article filter with annular restrictor and downstream ventilation
US20080216853A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Smoking article with open ended filter and restrictor
US20080216850A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Restrictor attachment for unfiltered smoking article
US20080216854A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Methods of making reconstituted tobacco sheets
US20080216851A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Smoking articles with restrictor and aerosol former
US20080245377A1 (en) * 2007-04-04 2008-10-09 R.J. Reynolds Tobacco Company Cigarette comprising dark-cured tobacco
US20090090372A1 (en) * 2005-09-23 2009-04-09 R.J. Reynolds Tobacco Company Equipment for Insertion of Objects into Smoking Articles
US20090288669A1 (en) * 2008-05-21 2009-11-26 R.J. Reynolds Tobacco Company Cigarette filter comprising a degradable fiber
US20090288672A1 (en) * 2008-05-21 2009-11-26 R. J. Reynolds Tobacco Company Cigarette Filter Comprising a Carbonaceous Fiber
US20100125039A1 (en) * 2008-11-20 2010-05-20 R. J. Reynolds Tobacco Company Carbonaceous Material Having Modified Pore Structure
US20100122708A1 (en) * 2008-11-20 2010-05-20 R. J. Reynolds Tobacco Company Adsorbent Material Impregnated with Metal Oxide Component
US20100186757A1 (en) * 2005-08-01 2010-07-29 Crooks Evon L Smoking Article
US7878963B2 (en) 2006-03-28 2011-02-01 Philip Morris Usa Inc. Smoking article with a restrictor
US20110083675A1 (en) * 2009-10-09 2011-04-14 Philip Morris Usa Inc. Smoking article with valved restrictor
US20110083687A1 (en) * 2009-10-09 2011-04-14 Philip Morris Usa Inc. Cigarette filter to reduce smoke deliveries in later puffs
US20110088704A1 (en) * 2009-10-15 2011-04-21 Philip Morris Usa Inc. Enhanced subjective activated carbon cigarette
US20110108044A1 (en) * 2009-11-11 2011-05-12 R.J. Reynolds Tobacco Company Filter element comprising smoke-altering material
US20110180084A1 (en) * 2010-01-27 2011-07-28 R.J. Reynolds Tobacco Company Apparatus and associated method for forming a filter component of a smoking article
US7987856B2 (en) 2005-12-29 2011-08-02 Philip Morris Usa Inc. Smoking article with bypass channel
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US8434499B2 (en) 2009-10-09 2013-05-07 Philip Morris Usa Inc. Filter design for improving sensory profile of carbon filter-tipped smoking articles
US8739802B2 (en) 2006-10-02 2014-06-03 R.J. Reynolds Tobacco Company Filtered cigarette
US20150027468A1 (en) * 2013-07-25 2015-01-29 Altria Client Services Inc. Electronic smoking article
US9138016B2 (en) 2010-03-26 2015-09-22 Philip Morris Usa Inc. Smoking articles with significantly reduced gas vapor phase smoking constituents
US20160249675A1 (en) * 2013-10-11 2016-09-01 British American Tobacco (Investments) Limited Additive releasing materials
US10076135B2 (en) 2014-05-23 2018-09-18 Greenbutts Llc Biodegradable cigarette filter tow and method of manufacture
WO2018203264A1 (en) 2017-05-03 2018-11-08 R.J. Reynolds Tobacco Company Flavored menthol-containing objects for application to smoking article components
US10188140B2 (en) 2005-08-01 2019-01-29 R.J. Reynolds Tobacco Company Smoking article
US10609955B2 (en) 2011-04-08 2020-04-07 R.J. Reynolds Tobacco Company Filtered cigarette comprising a tubular element in filter
US11957163B2 (en) 2011-04-08 2024-04-16 R.J. Reynolds Tobacco Company Multi-segment filter element including smoke-altering flavorant

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122473B (en) * 1982-06-29 1986-08-20 British American Tobacco Co Improvements relating to smoking articles
GB2236656A (en) * 1989-10-11 1991-04-17 Rothmans Int Tobacco Flavoured cigarette filters
DE202014001649U1 (de) * 2014-02-22 2014-03-20 Thomas Demircan Aromatisiertes Kieselgel, Aktivkohle, Vlies, Papier oder andere gängige Filtermedien zur Anwendung als Filter, Luftaromatisierung und Geschmacksträger in der Getränkeindustrie
CN104939307B (zh) * 2015-07-17 2019-08-09 云南中烟工业有限责任公司 一种烟用极性香料载核及应用

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR685864A (fr) * 1929-11-19 1930-07-18 Procédé pour l'élimination des éléments toxiques de la fumée de tabac
US2063014A (en) * 1932-12-22 1936-12-08 Raymond P Allen Tobacco
US2164702A (en) * 1936-02-29 1939-07-04 Davidson Glenn Method and apparatus for making cigarette mouthpieces
AT173262B (de) * 1951-02-26 1952-12-10 Samum Vereinigte Papier Ind K Filter zur Entgiftung von Tabakrauch
US2801638A (en) * 1954-05-11 1957-08-06 American Tobacco Co Filter tip for tobacco products

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR685864A (fr) * 1929-11-19 1930-07-18 Procédé pour l'élimination des éléments toxiques de la fumée de tabac
US2063014A (en) * 1932-12-22 1936-12-08 Raymond P Allen Tobacco
US2164702A (en) * 1936-02-29 1939-07-04 Davidson Glenn Method and apparatus for making cigarette mouthpieces
AT173262B (de) * 1951-02-26 1952-12-10 Samum Vereinigte Papier Ind K Filter zur Entgiftung von Tabakrauch
US2801638A (en) * 1954-05-11 1957-08-06 American Tobacco Co Filter tip for tobacco products

Cited By (150)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473539A (en) * 1965-02-03 1969-10-21 Brown & Williamson Tobacco Bonded filter rod for smoking articles
US3410275A (en) * 1965-03-30 1968-11-12 Irwin W. Tucker Cigarette filter
US3390686A (en) * 1965-12-21 1968-07-02 American Tobacco Co Tobacco smoke filter element
US3575180A (en) * 1968-08-07 1971-04-20 H 2 0 Filter Corp The Water-reactive filter element for smoking devices
US3603319A (en) * 1968-12-13 1971-09-07 Philip Morris Inc Flavor-releasing smoking article and method of making the same
US3584630A (en) * 1969-08-20 1971-06-15 Philip Morris Inc Tobacco product having low nicotine content associated with a release agent having nicotine weakly absorbed thereon
US3636957A (en) * 1971-03-05 1972-01-25 Charles M Saffer Jr Cigar smoke filter and method for improving the quality of cigar smoke
DE2747775A1 (de) * 1976-10-28 1978-05-03 Olin Corp Aromatisierte zigarette
US5076292A (en) * 1984-09-14 1991-12-31 R. J. Reynolds Tobacco Company Smoking article
US4793365A (en) * 1984-09-14 1988-12-27 R. J. Reynolds Tobacco Company Smoking article
US4827950A (en) * 1986-07-28 1989-05-09 R. J. Reynolds Tobacco Company Method for modifying a substrate material for use with smoking articles and product produced thereby
EP0342538A3 (en) * 1988-05-16 1990-12-05 R.J. Reynolds Tobacco Company Smoking article with improved means for delivering flavorants
US5137034A (en) * 1988-05-16 1992-08-11 R. J. Reynolds Tobacco Company Smoking article with improved means for delivering flavorants
EP0342538A2 (en) * 1988-05-16 1989-11-23 R.J. Reynolds Tobacco Company Smoking article with improved means for delivering flavorants
US5360023A (en) * 1988-05-16 1994-11-01 R. J. Reynolds Tobacco Company Cigarette filter
US4991606A (en) * 1988-07-22 1991-02-12 Philip Morris Incorporated Smoking article
US4966171A (en) * 1988-07-22 1990-10-30 Philip Morris Incorporated Smoking article
US5345951A (en) * 1988-07-22 1994-09-13 Philip Morris Incorporated Smoking article
US5443560A (en) * 1989-11-29 1995-08-22 Philip Morris Incorporated Chemical heat source comprising metal nitride, metal oxide and carbon
EP0482587A1 (en) * 1990-10-22 1992-04-29 Kimberly-Clark Corporation Flavor release material and method of manufacturing same
US5115823A (en) * 1990-12-20 1992-05-26 Philip Morris Incorporated Flavor-enhancing smoking filter
US5275859A (en) * 1992-12-21 1994-01-04 Eastman Kodak Company Tobacco smoke filter
US5404890A (en) * 1993-06-11 1995-04-11 R. J. Reynolds Tobacco Company Cigarette filter
US20050000531A1 (en) * 2001-11-09 2005-01-06 Xuling Shi Method and composition for mentholation of charcoal filtered cigarettes
US20100319718A1 (en) * 2001-12-18 2010-12-23 Schlueter Adolf Ventilated smoking article
US20050076927A1 (en) * 2001-12-18 2005-04-14 Adolf Schluter Ventilated smoking article
WO2003071886A1 (en) 2002-02-22 2003-09-04 Philip Morris Products S.A. Flavored carbon useful as filtering material of smoking article
US20040226569A1 (en) * 2002-02-22 2004-11-18 Philip Morris Incorporated Flavored carbon useful as filtering material of smoking article
US20030159703A1 (en) * 2002-02-22 2003-08-28 Zuyin Yang Flavored carbon useful as filtering material of smoking article
US20040016436A1 (en) * 2002-07-26 2004-01-29 Charles Thomas Adsorbents for smoking articles comprising a non-volatile organic compound applied using a supercritical fluid
US8114475B2 (en) 2002-07-26 2012-02-14 Philip Morris Usa Inc. Adsorbents for smoking articles comprising a non-volatile organic compound applied using a supercritical fluid
US20090272391A1 (en) * 2002-07-26 2009-11-05 Charles Thomas Adsorbents for smoking articles comprising a non-volatile organic compound applied using a supercritical fluid
US20050172976A1 (en) * 2002-10-31 2005-08-11 Newman Deborah J. Electrically heated cigarette including controlled-release flavoring
WO2004041007A2 (en) 2002-10-31 2004-05-21 Philip Morris Products S.A. Electrically heated cigarette including controlled-release flavoring
US20040129280A1 (en) * 2002-10-31 2004-07-08 Woodson Beverley C. Electrically heated cigarette including controlled-release flavoring
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US20070102012A1 (en) * 2003-04-09 2007-05-10 Philip Morris Usa Inc. On line formation of recessed cigarette filter
US20040231684A1 (en) * 2003-05-20 2004-11-25 Zawadzki Michael A. Smoking article and smoking article filter
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US20100000552A1 (en) * 2004-11-02 2010-01-07 Woodson Beverley C Temperature Sensitive Powder for Enhanced Flavor Delivery in Smoking Articles
US8408216B2 (en) 2004-12-22 2013-04-02 Philip Morris Usa Inc. Flavor carrier for use in smoking articles
US20060130861A1 (en) * 2004-12-22 2006-06-22 Philip Morris Usa Inc. Flavor carrier for use in smoking articles
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US7856988B2 (en) 2005-10-18 2010-12-28 Philip Morris Usa Inc. Method of making reconstituted tobacco with bonded flavorant
US8297288B2 (en) 2005-10-18 2012-10-30 Philip Morris Usa Inc. Reconstituted tobacco with bonded flavorant, smoking article and methods
US7987856B2 (en) 2005-12-29 2011-08-02 Philip Morris Usa Inc. Smoking article with bypass channel
US8240315B2 (en) 2005-12-29 2012-08-14 Philip Morris Usa Inc. Smoking article with improved delivery profile
US20070186945A1 (en) * 2005-12-29 2007-08-16 Philip Morris Usa Inc. Smoking article with improved delivery profile
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US8864909B2 (en) 2006-02-09 2014-10-21 Philip Morris Usa Inc. Gamma cyclodextrin flavoring-release additives
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US11690395B2 (en) 2006-02-09 2023-07-04 Altria Client Services Llc Gamma cyclodextrin flavoring-release additives
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US9060546B2 (en) 2006-03-28 2015-06-23 Philip Morris Usa Inc. Smoking article with a restrictor
US7878963B2 (en) 2006-03-28 2011-02-01 Philip Morris Usa Inc. Smoking article with a restrictor
US8353298B2 (en) 2006-07-12 2013-01-15 Philip Morris Usa Inc. Smoking article with impaction filter segment
US20080017204A1 (en) * 2006-07-12 2008-01-24 Philip Morris Usa Inc. Smoking article with impaction filter segment
US8424539B2 (en) 2006-08-08 2013-04-23 Philip Morris Usa Inc. Smoking article with single piece restrictor and chamber
US20080035162A1 (en) * 2006-08-08 2008-02-14 Philip Morris Usa Inc. Smoking article with single piece restrictor and chamber
US8739802B2 (en) 2006-10-02 2014-06-03 R.J. Reynolds Tobacco Company Filtered cigarette
US20080083672A1 (en) * 2006-10-10 2008-04-10 Xing Dong Adsorbent composition and method of making same
US8235056B2 (en) 2006-12-29 2012-08-07 Philip Morris Usa Inc. Smoking article with concentric hollow core in tobacco rod and capsule containing flavorant and aerosol forming agents in the filter system
US20080163877A1 (en) * 2006-12-29 2008-07-10 Philip Morris Usa Inc. Smoking article with concentric hollow core in tobacco rod and capsule containing flavorant and aerosol forming agents in the filter system
US20080216850A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Restrictor attachment for unfiltered smoking article
US8353302B2 (en) 2007-03-09 2013-01-15 Philip Morris Usa Inc. Smoking articles with restrictor and aerosol former
US8109277B2 (en) 2007-03-09 2012-02-07 Philip Morris USA Inc, Smoking article filter with annular restrictor and downstream ventilation
US20080216848A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Smoking article filter with annular restrictor and downstream ventilation
US20080216854A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Methods of making reconstituted tobacco sheets
US8235057B2 (en) 2007-03-09 2012-08-07 Philip Morris Usa Inc. Smoking article with open ended filter and restrictor
US20080216853A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Smoking article with open ended filter and restrictor
US20080216851A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Smoking articles with restrictor and aerosol former
US20080245377A1 (en) * 2007-04-04 2008-10-09 R.J. Reynolds Tobacco Company Cigarette comprising dark-cured tobacco
US8186360B2 (en) 2007-04-04 2012-05-29 R.J. Reynolds Tobacco Company Cigarette comprising dark air-cured tobacco
US8613284B2 (en) 2008-05-21 2013-12-24 R.J. Reynolds Tobacco Company Cigarette filter comprising a degradable fiber
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US20090288669A1 (en) * 2008-05-21 2009-11-26 R.J. Reynolds Tobacco Company Cigarette filter comprising a degradable fiber
US8079369B2 (en) 2008-05-21 2011-12-20 R.J. Reynolds Tobacco Company Method of forming a cigarette filter rod member
US8375958B2 (en) 2008-05-21 2013-02-19 R.J. Reynolds Tobacco Company Cigarette filter comprising a carbonaceous fiber
US20090288672A1 (en) * 2008-05-21 2009-11-26 R. J. Reynolds Tobacco Company Cigarette Filter Comprising a Carbonaceous Fiber
US8511319B2 (en) 2008-11-20 2013-08-20 R. J. Reynolds Tobacco Company Adsorbent material impregnated with metal oxide component
US20100125039A1 (en) * 2008-11-20 2010-05-20 R. J. Reynolds Tobacco Company Carbonaceous Material Having Modified Pore Structure
US8119555B2 (en) 2008-11-20 2012-02-21 R. J. Reynolds Tobacco Company Carbonaceous material having modified pore structure
US20100122708A1 (en) * 2008-11-20 2010-05-20 R. J. Reynolds Tobacco Company Adsorbent Material Impregnated with Metal Oxide Component
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US20110083687A1 (en) * 2009-10-09 2011-04-14 Philip Morris Usa Inc. Cigarette filter to reduce smoke deliveries in later puffs
US20110083675A1 (en) * 2009-10-09 2011-04-14 Philip Morris Usa Inc. Smoking article with valved restrictor
US8424540B2 (en) 2009-10-09 2013-04-23 Philip Morris Usa Inc. Smoking article with valved restrictor
US8434499B2 (en) 2009-10-09 2013-05-07 Philip Morris Usa Inc. Filter design for improving sensory profile of carbon filter-tipped smoking articles
US8905037B2 (en) 2009-10-15 2014-12-09 Philip Morris Inc. Enhanced subjective activated carbon cigarette
US20110088704A1 (en) * 2009-10-15 2011-04-21 Philip Morris Usa Inc. Enhanced subjective activated carbon cigarette
WO2011060008A1 (en) 2009-11-11 2011-05-19 R. J. Reynolds Tobacco Company Filter element comprising smoke-altering material
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US9119420B2 (en) 2010-07-30 2015-09-01 R.J. Reynolds Tobacco Company Filter element comprising multifunctional fibrous smoke-altering material
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US20130228188A1 (en) * 2010-10-20 2013-09-05 Japan Tobacco Inc. Menthol-sorbed activated charcoal, cigarette filter, and filter-tipped cigarette
WO2012053251A1 (ja) 2010-10-20 2012-04-26 日本たばこ産業株式会社 メンソール添着活性炭、シガレット用フィルタおよびフィルタ付シガレット
US9675105B2 (en) * 2010-10-20 2017-06-13 Japan Tobacco Inc. Menthol-sorbed activated charcoal, cigarette filter, and filter-tipped cigarette
US11957163B2 (en) 2011-04-08 2024-04-16 R.J. Reynolds Tobacco Company Multi-segment filter element including smoke-altering flavorant
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US20150027468A1 (en) * 2013-07-25 2015-01-29 Altria Client Services Inc. Electronic smoking article
US11160305B2 (en) * 2013-10-11 2021-11-02 British American Tobacco (Investments) Limited Additive releasing materials
US20160249675A1 (en) * 2013-10-11 2016-09-01 British American Tobacco (Investments) Limited Additive releasing materials
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WO2018203264A1 (en) 2017-05-03 2018-11-08 R.J. Reynolds Tobacco Company Flavored menthol-containing objects for application to smoking article components

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DE1517242A1 (de) 1970-10-08
CH407846A (fr) 1966-02-15
FR1352129A (fr) 1964-02-14
NL282359A (it)
ES280230A1 (es) 1962-11-01
FI43402B (it) 1970-11-30
JPS5122080B1 (it) 1976-07-07
LU42324A1 (it) 1962-11-07
GB951510A (en) 1964-03-04

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