US2764513A - Cigarette with means for removing deleterious products of combustion - Google Patents

Cigarette with means for removing deleterious products of combustion Download PDF

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Publication number
US2764513A
US2764513A US42052954A US2764513A US 2764513 A US2764513 A US 2764513A US 42052954 A US42052954 A US 42052954A US 2764513 A US2764513 A US 2764513A
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partition
cigarette
wrapper
smoke
solid
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Abe R Brothers
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Abe R Brothers
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    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/04Tobacco smoke filters characterised by their shape or structure
    • A24D3/045Tobacco smoke filters characterised by their shape or structure with smoke acceleration means, e.g. impact-filters

Description

p 1956 A. R. BROTHERS CIGARETTE WITH MEANS FOR REMOVING DELETERIOUS PRODUCTS 0F COMBUSTION Filed Aprll 2, 1954 INVENTOR. F755 E. Beam 5E5 HTTORA/EY United States PatentO 6 Claims. (Cl. 131-10) This invention is a cigarette in which is incorporated means for removing from the products of combustion of the tobacco, harmful or deleterious materials, such as tars, resins, nicotine and dust.

It has become quite common for cigarette smokers to use cigarette holders embodying various expedients for removing these deleterious by-products of smoking, but a great majority of smokers prefer to smoke cigarettes without a holder. Consequently various attempts have been made to incorporate into the cigarette various filtering expedients which have generally taken the form of wads of cotton or other cellulosic material which have been positioned at the mouth end of the cigarette. These expedients do not satisfactorily perform the functions intended for them.

I have given this problem much thought and consideration and have carried out numerous experiments and tests with a view to providing a cigarette with built-in means for efficiently removing the products to which I have referred.

As a result of my studies in this connection, I have conceived a relatively simple construction that maybe readily and economically incorporated in a cigarette during the manufacture thereof and which will give much more satisfactory results than any of the so-called filter tip cigarettes now on the market.

Speaking generally, the present invention embodies the incorporation, in the mouth end portion of the cigarette of a partition or cross axial wall positioned some little distance from the mouth end of the cigarette and also spaced from the tobacco within the cigarette wrapper. The cigarette is thus provided with chambers at both sides of the partition. In the partition is formed one or more perforations of a single or aggregate cross section having a distinct relation to the space between the partition and the tobacco, as hereinafter more fully explained in detail. Experience has shown that, when such a cig- I Patented Sept. 25, 1956 to, will be apparent from the hereinafter detailed description and claims, when read in conjunction with th accompanying drawing.

The accompanying drawing illustrates different-practical embodiments of the invention, but the constructions therein shown are to be understood .as illustrative, only, and not as defining the limits of the invention.

Fig. l is a cross section of a cigarette embodying the present invention. 1

Fig. 2 isan exploded view showing the several parts of the cigarette of Fig. 1 detached from one another.

Fig. 3 is an enlarged crosssection on the linev 33 of Fig. l.

Fig. 4 is a view similar to Fig. 1, but showing a modified form of the invention.

Fig. 5 is a section on the line 55 of Fig. 4.

Fig. 6 is a section on the line 6-6 of Fig. 4.

In Figs. 1-3, inclusive the wrapper 1 of the cigarette is conventional and in it is contained tobacco 2 of conventional form, but this tobacco does not completely fill the wrapper to the mouth end,-so thatthe mouth end portion of the cigarette is free from tobacco contents. Into the space thus left is positioned a sleeve 3 of fairly stifi material, such, for example, as cardboard. This cardboard-is of a single layer. It is cut from fiat stock of a width equal to the internal circumference of the wrapper 1 and, when incorporated into the cigarette, its

extend from the month end of the cigarette to a point arette is smoked, there is a very considerable deposit of extraneous deleterious matter extracted from the smoke and caused to accumulate and build up over the surface of the partition remote from the tobacco and about the perforation or perforations in such partition. I am unable to explain the theory or reason for this phenomenon, but I know that it occurs as stated, and thatin this way a very considerable part of the deleterious contents of the smoke are removed from the smoke before it enters the mouth of the smoker. The chambers, to which I have referred, may, if desired, contain filtering material, such as heretofore used in the art, although the invention will function satisfactorily in the'absence of such filtering materials.

An important feature of this invention resides in the employment of a tight impervious seal between the periphery of the partition and the cigarette wrapper, so that there is no leakage at this point, whereby all smoke passing to the mouth of the user must pass through the perforations in the partition as stated.

Features of the invention, other than those adverted contiguous to the tobacco. The partition 5 is spaced from the tobacco 2 to leave an intermediate air space 6 and also spaced from the mouth end of the cigarette to leave an intermediate air space 7'.

The partition 5 may be in the form of a solid disk which may be flat, convex or concave or any combination of these shapes and its periphery. may be adhesively secured or otherwise attached to the sleeve 3 or the wrapper 1 in such manner as to firmly maintain it in position and to assure a leak-proof, impervious joint about the periphery of the partition. In the drawing, however, the partition is shown as the upper end wall of a so-called cartridge '8. This cartridge may be made from a wide variety of materials, such as paper, metal foil, metal foil laminated on paper, gelatin, organic plastics, and natural or synthetic ,resins.

The partition 5 is provided with one or more openings or perforations. If only one opening is employed, as indicated at 9 in the drawing, that opening may have a diameter between .070" to .015". If a plurality of openings are employed, they should be sufiiciently smaller to yield comparable cross sectional areas. There should be a definite relationship between the height or air space 6 and the size of the openings in order to give the best results. This relationship may be expressed as ranging from 7 of space fora .070" opening to space for a .015 openings, with a tolerance of plus or minus to compensate for the materials used and the type of filtering material that I may employ as hereinafter described.

In practice, the cigarette may be used with either or,

both air spaces 6 and 7 unencumbered. However, a wad of cotton may be packed within either or both of these air spaces. A wad of cotton is indicated at 10 in the space 7 and, when thus employed, it should be so positioned in the space that it will contact the adjacent face of the partition 5. The cotton in the space 6 is preferably arranged to fill that space, although in any event, the packing of both wads of cotton should be suificiently .said partition is free to pass smoke at all times. openings 16 in the lower .baflle are positioned near the loose, so as not to interfere 'with the draft through the cigarette.

I have referred to these wads which are adapted to serve as mechanical filters,-as of cotton. [wish it understood, however, that any other fibrous cellulosicmaterial or the like may be employed in lieu of cotton, so long as it will function as-a 'mechanicalfilter to remove dust and any other deleterious material that may impinge upon and be entrapped thereby.

The cigarette of this invention -may be used with or without either or both of these filtering wads. When both of the air spaces 6 and 7 are free from'such filtering material, it is found that, during the passage of smoke through the openingoropenings 9, a peculiar phenomenon takes place. That is to say, tars, resins and other extraneous material of dark brown color accumulates in considerablequantities about the periphery of each opening on the month end side of thepartition and extends radially toward the periphery of this partition, as the smoking of the cigarette proceeds. As hereinbefore stated, l am not prepared to state why this is so, but it actually happens with the result that these deleterious materials are removed from the smoke before such smoke enters the mouth of the user and, as the cigarette is discarded after it has been smoked to the extent desired by the user, these deleterious materials are discarded with the cigarette.

It has been further demonstrated that if the filtering material in theair chamber 7 is in contact with the partition 5, the brown extraneous material seeps into and is dispersed throughout such filtering material which serves not only to assist in'the removal of such materials, but also entrainsdust which may pass-through the opening 9 with the smoke. If filtering material is contained in the airspace 6, the greater portion of dust is removed from the smoke before it even reaches the opening 9, but in any event the-smoke is again filtered when it passes through the filtering material 10-and before reaching the smokers mouth. The filtering material in the air cham her 6 thus serves as a primary filter while the filtering material in the chamber 7functions as a secondary filter.

Figs. 4, 5 and 6 show .a modified form of the invention. In these views the wrapper 1, tobacco 2 and sleeve 3 are as in the previous figures. The partition 5a, which corresponds to the partition 5, is shown'as flat and it is provided with a smoke opening or openings ,9, as previously described. There are, however, spaced above and below the partitionSa, solid baflles 11 and 12, respectively. The battle 11 may be of any shape, but is shown as upwardly domed with a peripheral flange 13 glued or otherwise secured within the-sleeve 3, so as'to .form an airproof seal or joint therewith. In this baffle 11 is formed a'series of openings shown as arcuate slots 14,- although they may be of any desired shape and of .any appropriate number. In any event, they are positioned near the periphery of the bafile.

The bafile '12 is domeddownwardly and has a peripheral huge 15 likewise .imperviously secured to the interior of the sleeve 3. This baflle 12 is also provided near its outer margin with a series of openings 16 of any appropriate shape or number. The tobacco 2 may rest against the upper baffle 11 which serves to definitely space the tobacco from the partition 5a.

,The holes in the upper 'baflle are sufiiciently small to preclude tobacco from passing therethrough and clogging the openings in the partition,5a,.so that the opening in The periphery thereof, so as to form between them a concave trap or receptacle for the accumulation of waste materials resulting from the phenomenon hereinbefore described. The openings in bafiies 11 and 12 are thus in staggered relation to opening 9.

It will be noted particularly from Fig. 4, that the products of combustion must pass through the battle 11 near its periphery, then pass through the central opening of the partition 'aand from thence move laterally to pass through the openings 16 of the lower partition. This devious passage of the products of combustion tends to free them from impurities and deleterious matter before the smoke passes to the mouth of the user.

The foregoing detailed description sets forth the invention in its preferred practical form, but the invention is to be understood as fully commensurate with the appended claims.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

l. A cigarette comprising: a wrapper with tobacco contained therein for a greater portion of the length of the Wrapper, there being provided Within the remaining length of the wrapper a solid cross axial partition peripherally hermetically sealed With respect to the Wrapper and perforated to form a path for smoke therethrough, said smoke path having an aggregate cross sectional-area equivalent to a circle of the order of .015 to .070" diameter, and solid bafiles arranged on opposite sides of said solid partition with their peripheries hermetically sealed with respect to the Wrapper to provide chambers for smoke between the partition and the bafiles, each of said baffies having openings all of which are ar ranged in staggered relation to the smoke path through the partition, said chambers being free of solid or mesh filtermaterial.

2. A cigarette according to claim 1, wherein the baffles are of concave form facing their respective partition sides.

3. A cigarette according to claim '1, wherein the baffle distant from the tobacco is also spaced from the corresponding end of the wrapper.

4. A cigarette according to claim 1, wherein the baffles are joined to the partition to form a unit which may be incorporated into a cigarette during its manufacture with either-baffle contiguous to the tobacco.

5. A cigarette according to claim 2, wherein the bafiles are joined to the partition to form a unit which may be incorporated into a cigarette during its manufacture with either ba'ffie contiguous to the tobacco.

' 6. A-ci-garette according to claim 3, wherein the baffies are joined to the partition to form a unit which may be incorporated into a cigarette during its manufacture with either baffie contiguous to the tobacco.

References Cited in the file of this patent UNITED STATES PATENTS 45,215 Auguste Nov. 29, 1864 1,761,205 Gibson June 3, 1930 1,841,952 Hughes Jan. 19, 1932 1,983,926 Zirmer Dec. 11, .1934 2,511,898 Brothers June 20., 1950 2,705,013 Brothers Mar. 29, 1955 FOREIGN PATENTS 1,145 Great Britain 1907 20,690 Germany Jan. 3, 1883 666,308 Great Britain Feb. 6, 1952

Claims (1)

1. A CIGARETTE COMPRISING: A WRAPPER WITH TOBACCO CONTAINED THEREIN FOR A GREATER PORTION OF THE LENGTH OF THE WRAPPER, THERE BEING PROVIDED WITHIN THE REMAINING LENGTH OF THE WRAPPER A SOLID CROSS AXIAL PARTITION PERIPHERALLY HERMETICALLY SEALED WITH RESPECT TO THE WRAPPER AND PERFORATED TO FORM A PATH FOR SMOKE THERETHROUGH, SAID SMOKE PATH HAVING AN AGGREGATE CROSS SECTIONAL AREA EQUIVALENT TO A CIRCLE OF THE ORDER OF .015" TO .070" DIAMETER, AND SOLID BAFFLES ARRANGED ON OPPOSITE SIDES OF SAID SOLID PARTITION WITH THEIR PERIPHERIES HERMETICALLY SEALED WITH RESPECT TO THE WRAPPER TO PROVIDE CHAMBERS FOR SMOKE BETWEEN THE PARTITION AND THE BAFFLES, EACH OF SAID BAFFLES HAVING OPENINGS ALL OF WHICH ARE ARRANGED IN STAGGERED RELATION TO THE SMOKE PATH THROUGH THE PARTITION, SAID CHAMBERS BEING FREE OF SOLID OR MESH FILTER MATERIAL.
US2764513A 1954-04-02 1954-04-02 Cigarette with means for removing deleterious products of combustion Expired - Lifetime US2764513A (en)

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Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941907A (en) * 1958-05-22 1960-06-21 Dow Chemical Co Tobacco compositions
US2949116A (en) * 1957-04-01 1960-08-16 Balkind Solomon Adjustable cigarette filter
US2954785A (en) * 1958-05-28 1960-10-04 Mac Farland Aveyard & Company Device for removal of tar and other deleterious substances from tobacco smoke
US2954787A (en) * 1958-04-01 1960-10-04 Mac Farland Aveyard & Company Filter for smokable articles
US2954783A (en) * 1958-06-12 1960-10-04 Mac Farland Aveyard & Company Filter type tobacco smoking structure for removal of tar
US2954782A (en) * 1958-04-18 1960-10-04 Mac Farland Aveyard & Company Cigarette filter structure
US2954778A (en) * 1956-11-16 1960-10-04 Mac Farland Aveyard & Company Auxiliary filtration means for filter-type cigarettes
US2954781A (en) * 1958-01-23 1960-10-04 Mac Farland Aveyard & Company Device for removal of tar and other deleterious substances from tobacco smoke
US2954774A (en) * 1958-05-20 1960-10-04 Mac Farland Aveyard & Company Tobacco tar removal structure
US2954772A (en) * 1957-05-28 1960-10-04 Mac Farland Aveyard & Company Removal of tar and other deleterious substances from tobacco smoke
US2954784A (en) * 1958-04-22 1960-10-04 Mac Farland Aveyard & Company Device for removal of tar and other deleterious substances from tobacco smoke
US2954780A (en) * 1957-12-23 1960-10-04 Mac Farland Aveyard & Company Device for removal of tar and other deleterious substances from tobacco smoke
US3038477A (en) * 1958-07-24 1962-06-12 Jacob A Saffir Cigarette filters
US3062220A (en) * 1959-04-22 1962-11-06 Abe R Brothers Plug for removing deleterious products of combustion from tobacco smoke
US3079926A (en) * 1958-10-24 1963-03-05 Harry R Litchfield Filters
US3081777A (en) * 1959-06-22 1963-03-19 Sipos Walter Cigarette filter
US3103221A (en) * 1960-04-06 1963-09-10 Harris Walter Cigarette filter
US3172410A (en) * 1962-09-13 1965-03-09 Achilles Corp Cigarette
US3179112A (en) * 1960-08-15 1965-04-20 Siegenheim Max Cigars or cigarettes
US3219041A (en) * 1964-09-10 1965-11-23 Bromberg Louis Article for smoking
US3269394A (en) * 1963-11-26 1966-08-30 Jr Joseph A Curtis Smoking accessory
US3270750A (en) * 1960-09-16 1966-09-06 Robert A Campbell Adjustable-filter cigarette
US3310056A (en) * 1964-01-14 1967-03-21 Rieder Zoltan Partition disc for inhale-proof cigarettes
US3318312A (en) * 1964-07-27 1967-05-09 Jr Joseph A Curtis Cigarette assembly
US3335729A (en) * 1964-03-31 1967-08-15 Andrew L Ice Cigarette filter means
DE1278914B (en) * 1963-11-07 1968-09-26 Anthony Paul Miller Cigarette
DE1298029B (en) * 1965-01-11 1969-06-19 E R T Etablissement De Rech S Filterstoepsel for tobacco products, especially cigarettes for
US3494366A (en) * 1967-04-03 1970-02-10 Herman S Starbuck Cigarette having heat sink means for removing impurities from cigarette smoke
US3690329A (en) * 1971-05-04 1972-09-12 Chu Siung Lin Cigarette holder
US3695274A (en) * 1970-11-30 1972-10-03 Brown & Williamson Tobacco Piston type cigarette filter
US4091821A (en) * 1976-11-02 1978-05-30 Scorzo Samuel P Smoking article having an ignition suppression disk
US20080017204A1 (en) * 2006-07-12 2008-01-24 Philip Morris Usa Inc. Smoking article with impaction filter segment
US20080047571A1 (en) * 2006-07-12 2008-02-28 Philip Morris Usa Inc. Smoking article with plate impactor
US20100288293A1 (en) * 2009-05-18 2010-11-18 Philip Morris Usa Inc. Smoking article with improved flow restriction element
US7878963B2 (en) 2006-03-28 2011-02-01 Philip Morris Usa Inc. Smoking article with a restrictor
US8109277B2 (en) 2007-03-09 2012-02-07 Philip Morris USA Inc, Smoking article filter with annular restrictor and downstream ventilation
US8235057B2 (en) 2007-03-09 2012-08-07 Philip Morris Usa Inc. Smoking article with open ended filter and restrictor
US8353302B2 (en) 2007-03-09 2013-01-15 Philip Morris Usa Inc. Smoking articles with restrictor and aerosol former
US8424539B2 (en) 2006-08-08 2013-04-23 Philip Morris Usa Inc. Smoking article with single piece restrictor and chamber
US8424540B2 (en) 2009-10-09 2013-04-23 Philip Morris Usa Inc. Smoking article with valved restrictor
US9138016B2 (en) 2010-03-26 2015-09-22 Philip Morris Usa Inc. Smoking articles with significantly reduced gas vapor phase smoking constituents

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20690C (en) *
US45215A (en) * 1864-11-29 Improved cigar-holder
GB190701145A (en) * 1907-01-16 1907-10-24 Benjamin Ansell A New and Improved Plug for or Attachment to Cigarettes.
US1761205A (en) * 1928-03-28 1930-06-03 John W Gibson Cigarette mouthpiece
US1841952A (en) * 1931-05-18 1932-01-19 James F Hughes Mouthpiece for cigarettes
US1983926A (en) * 1932-12-06 1934-12-11 Zirmer Martin Construction of cigarettes and the like
US2511898A (en) * 1950-06-20 Cigarette holder
GB666308A (en) * 1948-12-16 1952-02-06 Ladislao Jose Biro Improvements in or relating to filters for tobacco pipes or cigarette holders
US2705013A (en) * 1950-08-18 1955-03-29 Edwin S Brothers Cigarette holder

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20690C (en) *
US45215A (en) * 1864-11-29 Improved cigar-holder
US2511898A (en) * 1950-06-20 Cigarette holder
GB190701145A (en) * 1907-01-16 1907-10-24 Benjamin Ansell A New and Improved Plug for or Attachment to Cigarettes.
US1761205A (en) * 1928-03-28 1930-06-03 John W Gibson Cigarette mouthpiece
US1841952A (en) * 1931-05-18 1932-01-19 James F Hughes Mouthpiece for cigarettes
US1983926A (en) * 1932-12-06 1934-12-11 Zirmer Martin Construction of cigarettes and the like
GB666308A (en) * 1948-12-16 1952-02-06 Ladislao Jose Biro Improvements in or relating to filters for tobacco pipes or cigarette holders
US2705013A (en) * 1950-08-18 1955-03-29 Edwin S Brothers Cigarette holder

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954778A (en) * 1956-11-16 1960-10-04 Mac Farland Aveyard & Company Auxiliary filtration means for filter-type cigarettes
US2949116A (en) * 1957-04-01 1960-08-16 Balkind Solomon Adjustable cigarette filter
US2954772A (en) * 1957-05-28 1960-10-04 Mac Farland Aveyard & Company Removal of tar and other deleterious substances from tobacco smoke
US2954780A (en) * 1957-12-23 1960-10-04 Mac Farland Aveyard & Company Device for removal of tar and other deleterious substances from tobacco smoke
US2954781A (en) * 1958-01-23 1960-10-04 Mac Farland Aveyard & Company Device for removal of tar and other deleterious substances from tobacco smoke
US2954787A (en) * 1958-04-01 1960-10-04 Mac Farland Aveyard & Company Filter for smokable articles
US2954782A (en) * 1958-04-18 1960-10-04 Mac Farland Aveyard & Company Cigarette filter structure
US2954784A (en) * 1958-04-22 1960-10-04 Mac Farland Aveyard & Company Device for removal of tar and other deleterious substances from tobacco smoke
US2954774A (en) * 1958-05-20 1960-10-04 Mac Farland Aveyard & Company Tobacco tar removal structure
US2941907A (en) * 1958-05-22 1960-06-21 Dow Chemical Co Tobacco compositions
US2954785A (en) * 1958-05-28 1960-10-04 Mac Farland Aveyard & Company Device for removal of tar and other deleterious substances from tobacco smoke
US2954783A (en) * 1958-06-12 1960-10-04 Mac Farland Aveyard & Company Filter type tobacco smoking structure for removal of tar
US3038477A (en) * 1958-07-24 1962-06-12 Jacob A Saffir Cigarette filters
US3079926A (en) * 1958-10-24 1963-03-05 Harry R Litchfield Filters
US3062220A (en) * 1959-04-22 1962-11-06 Abe R Brothers Plug for removing deleterious products of combustion from tobacco smoke
US3081777A (en) * 1959-06-22 1963-03-19 Sipos Walter Cigarette filter
US3103221A (en) * 1960-04-06 1963-09-10 Harris Walter Cigarette filter
US3179112A (en) * 1960-08-15 1965-04-20 Siegenheim Max Cigars or cigarettes
US3270750A (en) * 1960-09-16 1966-09-06 Robert A Campbell Adjustable-filter cigarette
US3172410A (en) * 1962-09-13 1965-03-09 Achilles Corp Cigarette
DE1278914B (en) * 1963-11-07 1968-09-26 Anthony Paul Miller Cigarette
US3269394A (en) * 1963-11-26 1966-08-30 Jr Joseph A Curtis Smoking accessory
US3310056A (en) * 1964-01-14 1967-03-21 Rieder Zoltan Partition disc for inhale-proof cigarettes
US3335729A (en) * 1964-03-31 1967-08-15 Andrew L Ice Cigarette filter means
US3318312A (en) * 1964-07-27 1967-05-09 Jr Joseph A Curtis Cigarette assembly
US3219041A (en) * 1964-09-10 1965-11-23 Bromberg Louis Article for smoking
DE1298029B (en) * 1965-01-11 1969-06-19 E R T Etablissement De Rech S Filterstoepsel for tobacco products, especially cigarettes for
US3494366A (en) * 1967-04-03 1970-02-10 Herman S Starbuck Cigarette having heat sink means for removing impurities from cigarette smoke
US3695274A (en) * 1970-11-30 1972-10-03 Brown & Williamson Tobacco Piston type cigarette filter
US3690329A (en) * 1971-05-04 1972-09-12 Chu Siung Lin Cigarette holder
US4091821A (en) * 1976-11-02 1978-05-30 Scorzo Samuel P Smoking article having an ignition suppression disk
US7878963B2 (en) 2006-03-28 2011-02-01 Philip Morris Usa Inc. Smoking article with a restrictor
US9060546B2 (en) 2006-03-28 2015-06-23 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
US20080047571A1 (en) * 2006-07-12 2008-02-28 Philip Morris Usa Inc. Smoking article with plate impactor
US8424539B2 (en) 2006-08-08 2013-04-23 Philip Morris Usa Inc. Smoking article with single piece restrictor and chamber
US8109277B2 (en) 2007-03-09 2012-02-07 Philip Morris USA Inc, Smoking article filter with annular restrictor and downstream ventilation
US8353302B2 (en) 2007-03-09 2013-01-15 Philip Morris Usa Inc. Smoking articles with restrictor and aerosol former
US8235057B2 (en) 2007-03-09 2012-08-07 Philip Morris Usa Inc. Smoking article with open ended filter and restrictor
US20100288293A1 (en) * 2009-05-18 2010-11-18 Philip Morris Usa Inc. Smoking article with improved flow restriction element
US8424540B2 (en) 2009-10-09 2013-04-23 Philip Morris Usa Inc. Smoking article with valved restrictor
US9138016B2 (en) 2010-03-26 2015-09-22 Philip Morris Usa Inc. Smoking articles with significantly reduced gas vapor phase smoking constituents

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