US3251365A - Tobacco smoke filter - Google Patents

Tobacco smoke filter Download PDF

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Publication number
US3251365A
US3251365A US262653A US26265363A US3251365A US 3251365 A US3251365 A US 3251365A US 262653 A US262653 A US 262653A US 26265363 A US26265363 A US 26265363A US 3251365 A US3251365 A US 3251365A
Authority
US
United States
Prior art keywords
filter
smoke
adsorbent
oxide
tobacco
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
US262653A
Other languages
English (en)
Inventor
Ii Charles H Keith
Jr William W Bates
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.)
Individual
Original Assignee
Individual
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 NL293155D priority Critical patent/NL293155A/xx
Application filed by Individual filed Critical Individual
Priority to US262653A priority patent/US3251365A/en
Priority to FR933266A priority patent/FR1356061A/fr
Priority to ES287631A priority patent/ES287631A1/es
Priority to GB20364/63A priority patent/GB973854A/en
Priority to NL293155A priority patent/NL123406C/xx
Priority to BE640746A priority patent/BE640746A/xx
Priority to FI244363A priority patent/FI40148C/fi
Priority to SE14116/63A priority patent/SE302737B/xx
Priority to DE19631517297D priority patent/DE1517297B1/de
Priority to AT1036763A priority patent/AT251464B/de
Priority to CH1583163A priority patent/CH440083A/de
Priority to LU45118D priority patent/LU45118A1/xx
Priority to DK31164AA priority patent/DK111197B/da
Priority to OA50219A priority patent/OA00272A/xx
Priority to CY32365A priority patent/CY323A/xx
Application granted granted Critical
Publication of US3251365A publication Critical patent/US3251365A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057—Surface area, e.g. B.E.T specific surface area
    • B01J20/28066—Surface area, e.g. B.E.T specific surface area being more than 1000 m2/g
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/312—Preparation
    • C01B32/342—Preparation characterised by non-gaseous activating agents
    • C01B32/348—Metallic compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/354—After-treatment
    • C01B32/384—Granulation
US262653A 1963-03-04 1963-03-04 Tobacco smoke filter Expired - Lifetime US3251365A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
NL293155D NL293155A (es) 1963-03-04
US262653A US3251365A (en) 1963-03-04 1963-03-04 Tobacco smoke filter
FR933266A FR1356061A (fr) 1963-03-04 1963-04-30 Matière filtrante, notamment pour la fumée du tabac
ES287631A ES287631A1 (es) 1963-03-04 1963-05-03 Un procedimiento para fabricar un material de filtro del humo de tabaco
GB20364/63A GB973854A (en) 1963-03-04 1963-05-22 Filter material
NL293155A NL123406C (es) 1963-03-04 1963-05-22
BE640746A BE640746A (es) 1963-03-04 1963-12-03
FI244363A FI40148C (fi) 1963-03-04 1963-12-11 Filter för tobaksrök
SE14116/63A SE302737B (es) 1963-03-04 1963-12-18
DE19631517297D DE1517297B1 (de) 1963-03-04 1963-12-20 Rauchfilter fuer Tabakwaren
AT1036763A AT251464B (de) 1963-03-04 1963-12-23 Filtermaterial
CH1583163A CH440083A (de) 1963-03-04 1963-12-23 Filtermaterial
LU45118D LU45118A1 (es) 1963-03-04 1963-12-27
DK31164AA DK111197B (da) 1963-03-04 1964-01-21 Tobaksrøgfiltermateriale.
OA50219A OA00272A (fr) 1963-03-04 1964-07-29 Filtre matériel.
CY32365A CY323A (en) 1963-03-04 1965-10-30 Filter material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US262653A US3251365A (en) 1963-03-04 1963-03-04 Tobacco smoke filter

Publications (1)

Publication Number Publication Date
US3251365A true US3251365A (en) 1966-05-17

Family

ID=22998436

Family Applications (1)

Application Number Title Priority Date Filing Date
US262653A Expired - Lifetime US3251365A (en) 1963-03-04 1963-03-04 Tobacco smoke filter

Country Status (15)

Country Link
US (1) US3251365A (es)
AT (1) AT251464B (es)
BE (1) BE640746A (es)
CH (1) CH440083A (es)
CY (1) CY323A (es)
DE (1) DE1517297B1 (es)
DK (1) DK111197B (es)
ES (1) ES287631A1 (es)
FI (1) FI40148C (es)
FR (1) FR1356061A (es)
GB (1) GB973854A (es)
LU (1) LU45118A1 (es)
NL (2) NL123406C (es)
OA (1) OA00272A (es)
SE (1) SE302737B (es)

Cited By (87)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327718A (en) * 1963-10-15 1967-06-27 Brown & Williamson Tobacco Tobacco-smoke filters
US3330285A (en) * 1964-07-14 1967-07-11 Arthur E Bergquist Filtering material and process
US3338246A (en) * 1964-05-04 1967-08-29 Union Carbide Corp Smoking tobacco preparation
US3351072A (en) * 1965-11-16 1967-11-07 Esco Corp Tobacco smoke filter
US3357320A (en) * 1965-02-05 1967-12-12 Brown & Williamson Tobacco Multiple filter assembly apparatus
US3390687A (en) * 1967-01-23 1968-07-02 Riviana Foods Inc Tobacco smoke filter for cigarettes, cigars, pipes and the like
US3390688A (en) * 1967-03-13 1968-07-02 Eastman Kodak Co Filter for removing oxides of nitrogen from tobacco smoke
US3403690A (en) * 1967-03-07 1968-10-01 Brown & Williamson Tobacco Filters for tobacco smoke
US3410277A (en) * 1966-08-10 1968-11-12 Lorillard Co P Tobacco having an oxadiazole additive
US3416541A (en) * 1965-10-24 1968-12-17 Andrew C. Hoover Jr. Cigarette filter
US3420245A (en) * 1965-02-05 1969-01-07 Eastman Kodak Co Particulate cellulose acetate tobacco smoke filter
US3424168A (en) * 1966-11-21 1969-01-28 Pittsburgh Activated Carbon Co Removing contaminants from cigarette smoke
US3426763A (en) * 1965-07-21 1969-02-11 Eastman Kodak Co Tobacco smoke filter having a coated carbon additive
US3428056A (en) * 1965-07-21 1969-02-18 Eastman Kodak Co Tobacco smoke filter incorporating coated polyolefin additive
US3428054A (en) * 1965-10-18 1969-02-18 Chemway Filters Inc Filter
US3434479A (en) * 1966-09-15 1969-03-25 Liggett & Myers Tobacco Co Permanganate tobacco smoke filter
US3459194A (en) * 1967-05-22 1969-08-05 Bertram Eichel Tobacco product incorporating a filter designed to inhibit the adverse effect of tobacco smoke on oral ubiquitous leucocytes
US3460543A (en) * 1966-03-21 1969-08-12 Liggett & Myers Inc Cigarette filter
US3502087A (en) * 1968-07-05 1970-03-24 Ernest J Romano Cigarette filter
US3527235A (en) * 1968-05-24 1970-09-08 Matra Corp Tobacco smoke filter device
US3596665A (en) * 1970-03-04 1971-08-03 Knud Lindgard Tobacco smoke filter
US3602233A (en) * 1969-05-06 1971-08-31 Ppg Industries Inc Smoking device incorporating microporous glass particle filter
US3635226A (en) * 1969-06-16 1972-01-18 British American Tobacco Co Tobacco-smoke filters
US3636957A (en) * 1971-03-05 1972-01-25 Charles M Saffer Jr Cigar smoke filter and method for improving the quality of cigar smoke
US3658069A (en) * 1970-02-17 1972-04-25 Stanford Research Inst Filter for reducing the level of carbon monoxide in tobacco smoke
US3664350A (en) * 1969-12-12 1972-05-23 Byron T Wall Cigarette
US3693632A (en) * 1970-04-20 1972-09-26 Brown & Williamson Tobacco Tobacco-smoke filters
US3703901A (en) * 1971-03-11 1972-11-28 Liggett & Myers Inc Tobacco composition
US3802441A (en) * 1972-01-26 1974-04-09 Brown & Williamson Tobacco Tobacco smoke filter additive
US3809097A (en) * 1971-07-27 1974-05-07 B Clayton Tobacco smoke filter
US3858587A (en) * 1974-02-05 1975-01-07 Anthony R Cavelli Magna-tip
US3882877A (en) * 1972-04-26 1975-05-13 Rothmans Of Pall Mall Filter for tobacco smoke
US3998232A (en) * 1974-10-31 1976-12-21 Smith Avery B Filtering tobacco smoke
US4038992A (en) * 1975-09-29 1977-08-02 The Japan Tobacco & Salt Public Corporation Granular composition for tobacco filter
US4149549A (en) * 1976-05-17 1979-04-17 Montclair Research Corporation Cigarette and filter
DE2911533A1 (de) * 1978-04-10 1979-10-18 British American Tobacco Co Aluminiumoxid-enthaltende chemisorbierende zusammensetzung
US4201234A (en) * 1977-02-21 1980-05-06 Sasmoco, S.A. Filter for smoking article, mainly cigarette
US4226250A (en) * 1978-07-12 1980-10-07 Peterson Labs., Inc. Smoking system to filter tobacco smoke
US4258730A (en) * 1975-02-26 1981-03-31 Seiko Tsukamoto Electrostatic and magnetic tobacco smoke filtering arrangement
US4363333A (en) * 1979-11-13 1982-12-14 British-American Tobacco Company Limited Tobacco-smoke filters
US4889143A (en) * 1986-05-14 1989-12-26 R. J. Reynolds Tobacco Company Cigarette rods and filters containing strands provided from sheet-like materials
US4964426A (en) * 1988-09-28 1990-10-23 Eastman Kodak Company Tobacco smoke filters and process for production thereof
US5063196A (en) * 1989-06-23 1991-11-05 Calgon Carbon Corporation Chromium-free impregnated activated carbon for adsorption of toxic gases and/or vapors
US5150723A (en) * 1988-09-28 1992-09-29 Eastman Kodak Company Process for the production of tobacco smoke filters
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
US5678576A (en) * 1995-01-06 1997-10-21 Nazaroff; William W. Apparatus for treating environmental tobacco smoke (ETS) particle and gas-phase contaminants
US5713377A (en) * 1994-07-19 1998-02-03 British-American Tobacco (Germany) Gmbh Tobacco cartridge
US6209547B1 (en) 1998-10-29 2001-04-03 Philip Morris Incorporated Cigarette filter
US6344071B1 (en) 2000-05-22 2002-02-05 3M Innovative Properties Company Broad spectrum filter system for filtering contaminants from air or other gases
US6481442B1 (en) * 2000-11-28 2002-11-19 Lorillard Licensing Company, Llc Smoking article including a filter for selectively removing carbonyls
EP1276547A1 (en) * 2000-04-20 2003-01-22 Philip Morris Products Inc. High efficiency cigarette filters having shaped micro cavity fibers impregnated with adsorbent or absorbent materials
US20030114298A1 (en) * 2001-09-14 2003-06-19 Rothmans, Benson & Hedges Inc. Process for making metal oxide-coated microporous materials
US6591839B2 (en) 1999-02-17 2003-07-15 Dieter Meyer Filter material for reducing harmful substances in tobacco smoke
US6615843B2 (en) * 2001-03-01 2003-09-09 Ivo E. Pera Tobacco smoke filter and relative composition made of antioxidant and mineral substances
US20040007241A1 (en) * 2002-04-12 2004-01-15 Ping Li Partially reduced nanoparticle additives to lower the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette
US6767860B2 (en) 2001-05-10 2004-07-27 3M Innovative Properties Company Sublimation of solid organic compounds onto substrate surfaces in the presence of a fluid impregnant
US6789548B2 (en) 2000-11-10 2004-09-14 Vector Tobacco Ltd. Method of making a smoking composition
US20040231684A1 (en) * 2003-05-20 2004-11-25 Zawadzki Michael A. Smoking article and smoking article filter
US20050000528A1 (en) * 2001-12-19 2005-01-06 Bereman Robert D. Method and composition for mentholation of cigarettes
US20050000531A1 (en) * 2001-11-09 2005-01-06 Xuling Shi Method and composition for mentholation of charcoal filtered cigarettes
US20050000529A1 (en) * 2001-12-19 2005-01-06 Bereman Robert D. Method and compositions for imparting cooling effect to tobacco products
US20050066982A1 (en) * 2003-09-30 2005-03-31 Clark Melissa Ann Filtered cigarette incorporating an adsorbent material
US20050066981A1 (en) * 2003-09-30 2005-03-31 Crooks Evon Llewellyn Filtered cigarette incorporating an adsorbent material
US20050066980A1 (en) * 2003-09-30 2005-03-31 Crooks Evon Llewellyn Filtered cigarette incorporating an adsorbent material
US20050066984A1 (en) * 2003-09-30 2005-03-31 Crooks Evon Llewellyn Filtered cigarette incorporating an adsorbent material
US20050066983A1 (en) * 2003-09-30 2005-03-31 Clark Melissa Ann Filtered cigarette incorporating an adsorbent material
US6911189B1 (en) 1999-10-29 2005-06-28 Philip Morris Usa Inc. Filter for selective removal of a gaseous component
WO2006051422A1 (en) * 2004-11-10 2006-05-18 Philip Morris Products S.A. Capsuled adsorbent flavored filter
US20070056600A1 (en) * 2005-09-14 2007-03-15 R. J. Reynolds Tobacco Company Filtered smoking article
US20070137666A1 (en) * 2005-12-13 2007-06-21 Philip Morris Usa Inc. Incorporation of ammonia-release compounds in smoking articles
US20070235046A1 (en) * 2006-03-31 2007-10-11 Philip Morris Usa Inc. Smoking articles comprising magnetic filter elements
US20070235049A1 (en) * 2006-03-31 2007-10-11 Philip Morris Usa Inc. Magnetic filter elements and cigarettes having magnetic filter elements
US20080029113A1 (en) * 2002-03-15 2008-02-07 Snaidr Stanislav M Low sidestream smoke cigarette with combustible paper having a modified ash
US20080135058A1 (en) * 2006-12-08 2008-06-12 Ted Calvin Germroth Tobacco smoke filter and method for removal of aldehydes from tobacco smoke
US20080134893A1 (en) * 2006-12-08 2008-06-12 Thauming Kuo Particulate filter media
US20080135060A1 (en) * 2006-12-08 2008-06-12 Thauming Kuo Aldehyde removal
US20090038632A1 (en) * 2005-03-29 2009-02-12 Maria Cashmore Porous Carbon Materials and Smoking Articles and Smoke Filters Therefor Incorporating Such Materials
US20100192964A1 (en) * 2000-09-18 2010-08-05 Rothmans, Benson & Hedges, Inc. Low sidestream smoke cigarette with combustible paper
WO2013011312A1 (en) * 2011-07-21 2013-01-24 British American Tobacco (Investments) Limited Porous carbon and methods of production thereof
EP2415519A4 (en) * 2009-04-03 2014-02-12 Japan Tobacco Inc CARBON MONO-OXIDE REDUCTION CATALYST FOR SMOKING ARTICLE, AND PROCESS FOR PRODUCING THE SAME
US8739802B2 (en) 2006-10-02 2014-06-03 R.J. Reynolds Tobacco Company Filtered cigarette
US20160073695A1 (en) * 2014-05-20 2016-03-17 R. J. Reynolds Tobacco Company Electrically-powered aerosol delivery system
US20170065000A1 (en) * 2014-05-20 2017-03-09 Rai Strategic Holdings, Inc. Electrically-powered aerosol delivery system
US20190307165A1 (en) * 2018-04-09 2019-10-10 Timothy Carney Hand-held smoke containment and filter device
CN111085170A (zh) * 2019-12-26 2020-05-01 中国电建集团中南勘测设计研究院有限公司 一种生物炭吸附材料及其应用
CN113115980A (zh) * 2021-04-01 2021-07-16 中国烟草总公司郑州烟草研究院 一种降低废气中苯酚含量的方法

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH468797A (de) * 1965-01-11 1969-02-28 De Rech S Tech Ets Filterstöpsel für Tabakwaren, insbesondere für Zigaretten
USRE28858E (en) * 1970-09-25 1976-06-15 Brown & Williamson Tobacco Corporation Selective gas phase filter material
FR2306645A1 (fr) * 1975-04-11 1976-11-05 Bour Andre Element filtrant pour cigarettes et analogues
DE3013256C2 (de) * 1980-04-03 1988-06-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Verfahren zur Herstellung von hochspezifischer Aktivkohle, die bei den Verfahren erhaltene Kohle und ihre Verwendung
JPS58141775A (ja) * 1982-02-16 1983-08-23 サントリー株式会社 タバコ用フイルタ−
US7011096B2 (en) 2001-08-31 2006-03-14 Philip Morris Usa Inc. Oxidant/catalyst nanoparticles to reduce carbon monoxide in the mainstream smoke of a cigarette
US6769437B2 (en) 2002-04-08 2004-08-03 Philip Morris Incorporated Use of oxyhydroxide compounds for reducing carbon monoxide in the mainstream smoke of a cigarette
US6782892B2 (en) 2002-08-30 2004-08-31 Philip Morris Usa Inc. Manganese oxide mixtures in nanoparticle form to lower the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette
US8701681B2 (en) 2003-10-27 2014-04-22 Philip Morris Usa Inc. Use of oxyhydroxide compounds in cigarette paper for reducing carbon monoxide in the mainstream smoke of a cigarette
US8051859B2 (en) 2003-10-27 2011-11-08 Philip Morris Usa Inc. Formation and deposition of sputtered nanoscale particles in cigarette manufacture
US7509961B2 (en) 2003-10-27 2009-03-31 Philip Morris Usa Inc. Cigarettes and cigarette components containing nanostructured fibril materials
US7640936B2 (en) * 2003-10-27 2010-01-05 Philip Morris Usa Inc. Preparation of mixed metal oxide catalysts from nanoscale particles
EP2130444A1 (en) 2008-06-06 2009-12-09 Xavier Wertz Smokable material and smokable articles

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190228470A (en) * 1902-12-24 1903-02-12 Pierre Mercier New or Improved Means for Preventing or Minimizing the Deleterious Effects of Tobacco Smoke
GB190507808A (en) * 1905-04-12 1906-03-15 James Dewar Improved Absorbents for Gases or Vapours and the Application thereof for Purifying or Recovering Gases or Vapours or like purposes.
US1519470A (en) * 1921-01-22 1924-12-16 Robert E Wilson Impregnated carbon and process of making same
US1895724A (en) * 1927-10-26 1933-01-31 Silica Gel Corp Process of removing sulphur compounds from gas mixtures
US2108860A (en) * 1934-11-12 1938-02-22 Paul Bechtner Method of and substance for treating tobacco smoke
US2511290A (en) * 1942-05-01 1950-06-13 Us Sec War Method of impregnating activated carbon
US2523875A (en) * 1942-05-01 1950-09-26 Jacque C Morrell Production of a protective carbon
GB654994A (en) * 1947-06-16 1951-07-04 Elie Pouterman Improvements in or relating to filters for tobacco smoke and methods of manufacturing such filters
US2792006A (en) * 1954-10-08 1957-05-14 Anders Jordahl Filters and filter material for use in filtering tobacco smoke
US2795227A (en) * 1955-02-15 1957-06-11 Seldeen Martin Tobacco smoke filter
US2815760A (en) * 1951-12-24 1957-12-10 Schreus Hans Theo Tobacco smoke filter
US2966157A (en) * 1957-06-07 1960-12-27 Eastman Kodak Co Polyolefin tobacco smoke filters
US3033212A (en) * 1959-04-17 1962-05-08 Eastman Kodak Co Tobacco smoke filter containing polyolefin cobweb additive

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR711397A (fr) * 1931-02-17 1931-09-08 Nikostop Ipari Es Kereskedelmi Procédé de préparation d'une substance ou filtre pour l'épuration de la fumée du tabac
DE608484C (de) * 1931-03-06 1935-01-26 Willy Stelkens Verfahren zur Herabsetzung der Giftwirkung von Tabakrauch
DE612737C (de) * 1933-09-23 1935-05-03 Carbo Norit Union Verwaltungs Filtereinlage fuer Zigarren, Zigaretten, Rauchspitzen o. dgl.
FR766247A (fr) * 1933-12-29 1934-06-25 Procédé et dispositif pour l'absorption de la nicotine et autres substances nocives du tabac dans les pipes, fume-cigares et fume-cigarettes
DE669172C (de) * 1935-06-28 1938-12-19 Helios Societa Cartaria A G L Filter fuer Zigaretten-, Zigarrenspitzen oder Zigarettenmundstuecke
DE666035C (de) * 1936-10-04 1938-10-08 Emma Elisabeth Lutter Verfahren zum Herstellen einer Filtermasse fuer die Rauchfilter von Zigaretten
GB685822A (en) * 1951-05-22 1953-01-14 Mario Francone An improved filtering agent for tobacco smoke
GB863287A (en) * 1957-12-13 1961-03-22 Lorillard Co P Smoking tobacco product

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190228470A (en) * 1902-12-24 1903-02-12 Pierre Mercier New or Improved Means for Preventing or Minimizing the Deleterious Effects of Tobacco Smoke
GB190507808A (en) * 1905-04-12 1906-03-15 James Dewar Improved Absorbents for Gases or Vapours and the Application thereof for Purifying or Recovering Gases or Vapours or like purposes.
US1519470A (en) * 1921-01-22 1924-12-16 Robert E Wilson Impregnated carbon and process of making same
US1895724A (en) * 1927-10-26 1933-01-31 Silica Gel Corp Process of removing sulphur compounds from gas mixtures
US2108860A (en) * 1934-11-12 1938-02-22 Paul Bechtner Method of and substance for treating tobacco smoke
US2523875A (en) * 1942-05-01 1950-09-26 Jacque C Morrell Production of a protective carbon
US2511290A (en) * 1942-05-01 1950-06-13 Us Sec War Method of impregnating activated carbon
GB654994A (en) * 1947-06-16 1951-07-04 Elie Pouterman Improvements in or relating to filters for tobacco smoke and methods of manufacturing such filters
US2815760A (en) * 1951-12-24 1957-12-10 Schreus Hans Theo Tobacco smoke filter
US2792006A (en) * 1954-10-08 1957-05-14 Anders Jordahl Filters and filter material for use in filtering tobacco smoke
US2795227A (en) * 1955-02-15 1957-06-11 Seldeen Martin Tobacco smoke filter
US2966157A (en) * 1957-06-07 1960-12-27 Eastman Kodak Co Polyolefin tobacco smoke filters
US3033212A (en) * 1959-04-17 1962-05-08 Eastman Kodak Co Tobacco smoke filter containing polyolefin cobweb additive

Cited By (120)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327718A (en) * 1963-10-15 1967-06-27 Brown & Williamson Tobacco Tobacco-smoke filters
US3338246A (en) * 1964-05-04 1967-08-29 Union Carbide Corp Smoking tobacco preparation
US3330285A (en) * 1964-07-14 1967-07-11 Arthur E Bergquist Filtering material and process
US3357320A (en) * 1965-02-05 1967-12-12 Brown & Williamson Tobacco Multiple filter assembly apparatus
US3420245A (en) * 1965-02-05 1969-01-07 Eastman Kodak Co Particulate cellulose acetate tobacco smoke filter
US3428056A (en) * 1965-07-21 1969-02-18 Eastman Kodak Co Tobacco smoke filter incorporating coated polyolefin additive
US3426763A (en) * 1965-07-21 1969-02-11 Eastman Kodak Co Tobacco smoke filter having a coated carbon additive
US3428054A (en) * 1965-10-18 1969-02-18 Chemway Filters Inc Filter
US3416541A (en) * 1965-10-24 1968-12-17 Andrew C. Hoover Jr. Cigarette filter
US3351072A (en) * 1965-11-16 1967-11-07 Esco Corp Tobacco smoke filter
US3460543A (en) * 1966-03-21 1969-08-12 Liggett & Myers Inc Cigarette filter
US3410277A (en) * 1966-08-10 1968-11-12 Lorillard Co P Tobacco having an oxadiazole additive
US3434479A (en) * 1966-09-15 1969-03-25 Liggett & Myers Tobacco Co Permanganate tobacco smoke filter
US3424168A (en) * 1966-11-21 1969-01-28 Pittsburgh Activated Carbon Co Removing contaminants from cigarette smoke
US3390687A (en) * 1967-01-23 1968-07-02 Riviana Foods Inc Tobacco smoke filter for cigarettes, cigars, pipes and the like
US3403690A (en) * 1967-03-07 1968-10-01 Brown & Williamson Tobacco Filters for tobacco smoke
US3390688A (en) * 1967-03-13 1968-07-02 Eastman Kodak Co Filter for removing oxides of nitrogen from tobacco smoke
US3459194A (en) * 1967-05-22 1969-08-05 Bertram Eichel Tobacco product incorporating a filter designed to inhibit the adverse effect of tobacco smoke on oral ubiquitous leucocytes
US3527235A (en) * 1968-05-24 1970-09-08 Matra Corp Tobacco smoke filter device
US3502087A (en) * 1968-07-05 1970-03-24 Ernest J Romano Cigarette filter
US3602233A (en) * 1969-05-06 1971-08-31 Ppg Industries Inc Smoking device incorporating microporous glass particle filter
US3635226A (en) * 1969-06-16 1972-01-18 British American Tobacco Co Tobacco-smoke filters
US3664350A (en) * 1969-12-12 1972-05-23 Byron T Wall Cigarette
US3658069A (en) * 1970-02-17 1972-04-25 Stanford Research Inst Filter for reducing the level of carbon monoxide in tobacco smoke
US3596665A (en) * 1970-03-04 1971-08-03 Knud Lindgard Tobacco smoke filter
US3693632A (en) * 1970-04-20 1972-09-26 Brown & Williamson Tobacco Tobacco-smoke filters
US3636957A (en) * 1971-03-05 1972-01-25 Charles M Saffer Jr Cigar smoke filter and method for improving the quality of cigar smoke
US3703901A (en) * 1971-03-11 1972-11-28 Liggett & Myers Inc Tobacco composition
US3809097A (en) * 1971-07-27 1974-05-07 B Clayton Tobacco smoke filter
US3802441A (en) * 1972-01-26 1974-04-09 Brown & Williamson Tobacco Tobacco smoke filter additive
US3882877A (en) * 1972-04-26 1975-05-13 Rothmans Of Pall Mall Filter for tobacco smoke
US3858587A (en) * 1974-02-05 1975-01-07 Anthony R Cavelli Magna-tip
US3998232A (en) * 1974-10-31 1976-12-21 Smith Avery B Filtering tobacco smoke
US4258730A (en) * 1975-02-26 1981-03-31 Seiko Tsukamoto Electrostatic and magnetic tobacco smoke filtering arrangement
US4038992A (en) * 1975-09-29 1977-08-02 The Japan Tobacco & Salt Public Corporation Granular composition for tobacco filter
US4149549A (en) * 1976-05-17 1979-04-17 Montclair Research Corporation Cigarette and filter
US4201234A (en) * 1977-02-21 1980-05-06 Sasmoco, S.A. Filter for smoking article, mainly cigarette
DE2911533A1 (de) * 1978-04-10 1979-10-18 British American Tobacco Co Aluminiumoxid-enthaltende chemisorbierende zusammensetzung
US4266561A (en) * 1978-04-10 1981-05-12 Brown & Williamson Tobacco Corporation Tobacco smoke filtering compositions
US4226250A (en) * 1978-07-12 1980-10-07 Peterson Labs., Inc. Smoking system to filter tobacco smoke
US4363333A (en) * 1979-11-13 1982-12-14 British-American Tobacco Company Limited Tobacco-smoke filters
US4889143A (en) * 1986-05-14 1989-12-26 R. J. Reynolds Tobacco Company Cigarette rods and filters containing strands provided from sheet-like materials
US5360023A (en) * 1988-05-16 1994-11-01 R. J. Reynolds Tobacco Company Cigarette filter
US5150723A (en) * 1988-09-28 1992-09-29 Eastman Kodak Company Process for the production of tobacco smoke filters
US4964426A (en) * 1988-09-28 1990-10-23 Eastman Kodak Company Tobacco smoke filters and process for production thereof
US5063196A (en) * 1989-06-23 1991-11-05 Calgon Carbon Corporation Chromium-free impregnated activated carbon for adsorption of toxic gases and/or vapors
US5404890A (en) * 1993-06-11 1995-04-11 R. J. Reynolds Tobacco Company Cigarette filter
US5713377A (en) * 1994-07-19 1998-02-03 British-American Tobacco (Germany) Gmbh Tobacco cartridge
US5678576A (en) * 1995-01-06 1997-10-21 Nazaroff; William W. Apparatus for treating environmental tobacco smoke (ETS) particle and gas-phase contaminants
US6595218B1 (en) 1998-10-29 2003-07-22 Philip Morris Incorporated Cigarette filter
US6209547B1 (en) 1998-10-29 2001-04-03 Philip Morris Incorporated Cigarette filter
US6591839B2 (en) 1999-02-17 2003-07-15 Dieter Meyer Filter material for reducing harmful substances in tobacco smoke
US6911189B1 (en) 1999-10-29 2005-06-28 Philip Morris Usa Inc. Filter for selective removal of a gaseous component
EP1276547A1 (en) * 2000-04-20 2003-01-22 Philip Morris Products Inc. High efficiency cigarette filters having shaped micro cavity fibers impregnated with adsorbent or absorbent materials
JP2004521603A (ja) * 2000-04-20 2004-07-22 フィリップ・モーリス・プロダクツ・インコーポレイテッド 吸着材または吸収材を含浸させた成形微細空洞ファイバを有する高効率シガレットフィルタ
EP1276547A4 (en) * 2000-04-20 2004-10-06 Philip Morris Prod HIGHLY EFFECTIVE CIGARETTE FILTERS WITH SHAPED FIBERS THAT HAVE MICRO-RECESSES AND ARE COATED WITH ADSORBENTS OR ADSORBENT MATERIAL
US6344071B1 (en) 2000-05-22 2002-02-05 3M Innovative Properties Company Broad spectrum filter system for filtering contaminants from air or other gases
US8678016B2 (en) 2000-09-18 2014-03-25 Rothmans, Benson & Hedges, Inc. Low sidestream smoke cigarette with combustible paper
US8267096B2 (en) 2000-09-18 2012-09-18 Rothmans, Benson & Hedges, Inc. Low sidestream smoke cigarette with combustible paper
US20100192964A1 (en) * 2000-09-18 2010-08-05 Rothmans, Benson & Hedges, Inc. Low sidestream smoke cigarette with combustible paper
US6789548B2 (en) 2000-11-10 2004-09-14 Vector Tobacco Ltd. Method of making a smoking composition
US6959712B2 (en) 2000-11-10 2005-11-01 Vector Tobacco Ltd. Method of making a smoking composition
US20060037621A1 (en) * 2000-11-10 2006-02-23 Bereman Robert D Method of making a smoking composition
US20050000532A1 (en) * 2000-11-10 2005-01-06 Bereman Robert D. Method of making a smoking composition
US6481442B1 (en) * 2000-11-28 2002-11-19 Lorillard Licensing Company, Llc Smoking article including a filter for selectively removing carbonyls
US6615843B2 (en) * 2001-03-01 2003-09-09 Ivo E. Pera Tobacco smoke filter and relative composition made of antioxidant and mineral substances
US6767860B2 (en) 2001-05-10 2004-07-27 3M Innovative Properties Company Sublimation of solid organic compounds onto substrate surfaces in the presence of a fluid impregnant
US7531477B2 (en) 2001-09-14 2009-05-12 Rothmans, Benson & Hedges Inc. Process for making metal oxide-coated microporous materials
US20030114298A1 (en) * 2001-09-14 2003-06-19 Rothmans, Benson & Hedges Inc. Process for making metal oxide-coated microporous materials
US6908874B2 (en) 2001-09-14 2005-06-21 Rothmans, Benson & Hedges Inc. Process for making metal oxide-coated microporous materials
US20050170948A1 (en) * 2001-09-14 2005-08-04 Rothmans, Benson & Hedges Inc. Process for making metal oxide-coated microporous materials
US20050000531A1 (en) * 2001-11-09 2005-01-06 Xuling Shi Method and composition for mentholation of charcoal filtered cigarettes
US20050000529A1 (en) * 2001-12-19 2005-01-06 Bereman Robert D. Method and compositions for imparting cooling effect to tobacco products
US20050000528A1 (en) * 2001-12-19 2005-01-06 Bereman Robert D. Method and composition for mentholation of cigarettes
US20080029113A1 (en) * 2002-03-15 2008-02-07 Snaidr Stanislav M Low sidestream smoke cigarette with combustible paper having a modified ash
US7168431B2 (en) 2002-04-12 2007-01-30 Philip Morris Usa Inc. Partially reduced nanoparticle additives to lower the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette
US20040007241A1 (en) * 2002-04-12 2004-01-15 Ping Li Partially reduced nanoparticle additives to lower the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette
US20040231684A1 (en) * 2003-05-20 2004-11-25 Zawadzki Michael A. Smoking article and smoking article filter
US9554594B2 (en) 2003-09-30 2017-01-31 R.J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US20050066980A1 (en) * 2003-09-30 2005-03-31 Crooks Evon Llewellyn Filtered cigarette incorporating an adsorbent material
US7856990B2 (en) * 2003-09-30 2010-12-28 R. J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US7669604B2 (en) 2003-09-30 2010-03-02 R.J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US7237558B2 (en) 2003-09-30 2007-07-03 R. J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US7240678B2 (en) 2003-09-30 2007-07-10 R. J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US7827997B2 (en) 2003-09-30 2010-11-09 R. J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US20050066983A1 (en) * 2003-09-30 2005-03-31 Clark Melissa Ann Filtered cigarette incorporating an adsorbent material
US20050066984A1 (en) * 2003-09-30 2005-03-31 Crooks Evon Llewellyn Filtered cigarette incorporating an adsorbent material
US20050066982A1 (en) * 2003-09-30 2005-03-31 Clark Melissa Ann Filtered cigarette incorporating an adsorbent material
US20050066981A1 (en) * 2003-09-30 2005-03-31 Crooks Evon Llewellyn Filtered cigarette incorporating an adsorbent material
US8066011B2 (en) 2003-09-30 2011-11-29 R. J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
EA010811B1 (ru) * 2004-11-10 2008-12-30 Филип Моррис Продактс С.А. Ароматизированный фильтр с инкапсулированным адсорбентом
CN101022740B (zh) * 2004-11-10 2012-06-13 菲利普莫里斯生产公司 带有香料的封装吸收剂过滤嘴
AU2005303448B2 (en) * 2004-11-10 2011-09-29 Philip Morris Products S.A. Capsuled adsorbent flavored filter
US20060112964A1 (en) * 2004-11-10 2006-06-01 Philip Morris Usa Inc. Capsuled adsorbent flavored filter
WO2006051422A1 (en) * 2004-11-10 2006-05-18 Philip Morris Products S.A. Capsuled adsorbent flavored filter
US9907336B2 (en) * 2005-03-29 2018-03-06 British American Tobacco (Investments) Limited Porous carbon materials and smoking articles and smoke filters therefor incorporating such materials
US20090038632A1 (en) * 2005-03-29 2009-02-12 Maria Cashmore Porous Carbon Materials and Smoking Articles and Smoke Filters Therefor Incorporating Such Materials
US20070056600A1 (en) * 2005-09-14 2007-03-15 R. J. Reynolds Tobacco Company Filtered smoking article
US8555897B2 (en) 2005-12-13 2013-10-15 Philip Morris Usa Inc. Method of making a cigarette and method of reducing cytotoxicity in tobacco smoke
US10051883B2 (en) 2005-12-13 2018-08-21 Philip Morris Usa Inc. Incorporation of ammonia release compounds in smoking articles
US20070137666A1 (en) * 2005-12-13 2007-06-21 Philip Morris Usa Inc. Incorporation of ammonia-release compounds in smoking articles
US8042552B2 (en) 2005-12-13 2011-10-25 Philip Morris Usa Inc. Incorporation of ammonia-release compounds in smoking articles
US20070235049A1 (en) * 2006-03-31 2007-10-11 Philip Morris Usa Inc. Magnetic filter elements and cigarettes having magnetic filter elements
US20070235046A1 (en) * 2006-03-31 2007-10-11 Philip Morris Usa Inc. Smoking articles comprising magnetic filter elements
US8739802B2 (en) 2006-10-02 2014-06-03 R.J. Reynolds Tobacco Company Filtered cigarette
US20080135058A1 (en) * 2006-12-08 2008-06-12 Ted Calvin Germroth Tobacco smoke filter and method for removal of aldehydes from tobacco smoke
US20080135060A1 (en) * 2006-12-08 2008-06-12 Thauming Kuo Aldehyde removal
US7855261B2 (en) 2006-12-08 2010-12-21 Eastman Chemical Company Aldehyde removal
US20080134893A1 (en) * 2006-12-08 2008-06-12 Thauming Kuo Particulate filter media
EP2415519A4 (en) * 2009-04-03 2014-02-12 Japan Tobacco Inc CARBON MONO-OXIDE REDUCTION CATALYST FOR SMOKING ARTICLE, AND PROCESS FOR PRODUCING THE SAME
WO2013011312A1 (en) * 2011-07-21 2013-01-24 British American Tobacco (Investments) Limited Porous carbon and methods of production thereof
AU2012285504B2 (en) * 2011-07-21 2015-01-15 British American Tobacco (Investments) Limited Porous carbon and methods of production thereof
KR20140054113A (ko) * 2011-07-21 2014-05-08 브리티시 아메리칸 토바코 (인베스트먼츠) 리미티드 다공성 카본 및 이의 제조 방법
US9642394B2 (en) 2011-07-21 2017-05-09 British American Tobacco (Investments) Limited Porous carbon and methods of production thereof
CN103687806A (zh) * 2011-07-21 2014-03-26 英美烟草(投资)有限公司 多孔炭及其生产方法
US20160073695A1 (en) * 2014-05-20 2016-03-17 R. J. Reynolds Tobacco Company Electrically-powered aerosol delivery system
US20170065000A1 (en) * 2014-05-20 2017-03-09 Rai Strategic Holdings, Inc. Electrically-powered aerosol delivery system
US20190307165A1 (en) * 2018-04-09 2019-10-10 Timothy Carney Hand-held smoke containment and filter device
CN111085170A (zh) * 2019-12-26 2020-05-01 中国电建集团中南勘测设计研究院有限公司 一种生物炭吸附材料及其应用
CN113115980A (zh) * 2021-04-01 2021-07-16 中国烟草总公司郑州烟草研究院 一种降低废气中苯酚含量的方法

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LU45118A1 (es) 1964-02-27
SE302737B (es) 1968-07-29
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BE640746A (es) 1964-06-03
GB973854A (en) 1964-10-28
CY323A (en) 1965-10-30
ES287631A1 (es) 1963-11-01
FI40148B (es) 1968-06-28
CH440083A (de) 1967-07-15
FR1356061A (fr) 1964-03-20
DE1517297B1 (de) 1970-08-06
DK111197B (da) 1968-06-24
OA00272A (fr) 1966-05-15
AT251464B (de) 1967-01-10
NL123406C (es) 1967-07-17
FI40148C (fi) 1968-10-10

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