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US3646941A - Cigarette and/or cigarette holder - Google Patents

Cigarette and/or cigarette holder Download PDF

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Publication number
US3646941A
US3646941A US857740A US3646941DA US3646941A US 3646941 A US3646941 A US 3646941A US 857740 A US857740 A US 857740A US 3646941D A US3646941D A US 3646941DA US 3646941 A US3646941 A US 3646941A
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United States
Prior art keywords
cone
tubular member
smoke
shaped
cigarette
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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
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US857740A
Inventor
Max J Doppelt
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.)
JAY A PRITZKER
E A CAREY PIPE CO
Original Assignee
JAY A PRITZKER
E A CAREY PIPE CO
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Application filed by JAY A PRITZKER, E A CAREY PIPE CO filed Critical JAY A PRITZKER
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Publication of US3646941A publication Critical patent/US3646941A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • A24D3/045—Tobacco smoke filters characterised by their shape or structure with smoke acceleration means, e.g. impact-filters

Definitions

  • ABSTRACT A cigarette or a cigarette holder for reducing the quantity of particulate, tar and nicotine, provide a cooler smoke, and considerably reduce toxic gases. It includes an apertured tubular member surrounded by a porous fibrous sleeve and a pair of generally cone-shaped members, one at the entrance end of the tubular member and the other at the exit or discharge end of the tubular member, with each cone-shaped member having a radial opening spaced from the inside of the tubular member and positioned approximately 180 from each other so that the smoke passing through the entrance cone is directed into the tubular member and mixed with air drawn thereinto and discharged through the radial opening in the exit cone-shaped member.
  • the apices of the cone-shaped members may abut or may be mutually spaced along the longitudinal axis of the holder.
  • the cigarette and/or cigarette holder formed with this invention includes a tubular member provided with a plurality of apertures, a porous sleeve surrounding said tubular member to enclose same, and a pair of generally cone-shaped members extending inwardly into said tubular member, one of said cone-shaped members being at the entrance end of the tubular member and the other at the exit thereof, with each cone-shaped member having at least one radial opening spaced 180 from the other so that the smoke entering the entrance cone-shaped member passes through the radial opening into the interior of the tubular member where it is mixed with air drawn through the sleeve into the tubular member and then passes out through the exit tubular member through said radial opening.
  • the smoke that passes from the tobacco end to the mouth of the smoker will travel a tortuous path and will deposit the particulate matter, such as the tar and nicotine in the article and will greatly reduce the amount of such matter that enters the mouth of the smoker. In addition, the smoke will be cooler and have a less objectionable smoking taste.
  • FIG. 1 is a side elevational view of the invention as embodied in a cigarette holder.
  • FIG. 2 is an enlarged cross-sectional view of FIG. 1 taken on the longitudinal center thereof.
  • FIG. 3 is a central sectional view of a cigarette embodying the invention.
  • FIG. 4 is a view similar to FIG. 2 but of a modified embodiment.
  • the cigarette holder generally indicated at 10, includes a tubular member 12 made of plastic or the like, provided with spaced radial openings 14. Positioned inside the tubular member 12 are two hollow cone-shaped members, preferably made of plastic. One of said cone-shaped members is designated by the numeral 16 and is positioned inside the tubular member inwardly of but adjacent the entrance or front thereof, and the other cone-shaped member 18 is positioned adjacent the exit or rear end of the tubular member.
  • the cone-shaped member 16 adjacent the entrance of tubular member 12 is provided with at least one radial opening 20 and it will be seen that said radial opening, best shown in FIG. 2, is spaced from the interior wall of the tubular member 12.
  • the cone-shaped member 18 adjacent the exit end of the tubular member also has a radial opening 22 which is likewise spaced from the interior wall of the tubular member 12.
  • the radial opening 20 of the entrance cone is spaced approximately 180 from the radial opening 22 in the exit cone.
  • the two cone members 16 and 18 are positioned inside the tubular member 12, as shown in FIG. 2, and are spaced axially from each other and may be secured by friction means or may be positively secured to the tubular plastic member 12.
  • a fibrous sleeve 24 surrounds the plastic tubular member 12.
  • the said sleeve 24 is a tubular fibrous member which is porous and absorbent and is made from a paper made from natural fibers, which is both porous and absorbent. It could extend over the length of the tubular member 12 but, as shown in FIG. 2, is short thereof, The front end 26 of the tubular member 12 extends forwardly of the cone 16 to provide a pocket 28 for receiving a cigarette 30.
  • the smoke as it enters the front cone 16 is constricted and converges to a reduced area at the tip 32 of the cone and is blocked from moving in its normal axial path. It has to change its direction to pass radially out of the cone through the radial opening 20 into the tubular chamber 34 where it expands and mixes with the fresh air drawn thereinto through the sleeve 24 and tortuous openings 14. This movement produces a turbulence in the chamber 34. As the smoke moves in an axial direction in chamber 34 it must enter radial opening 22, positioned from radial opening 20.
  • the smoke is constricted as it enters opening 22 and changes its flow to a radial flow into the rear cone, after which the smoke changes its direction to an axial flow and diverges as it passes out of the rear cone to the mouth of the smoker.
  • This continuous changing of the direction of the flow of the smoke through a tortuous path as it passes from the tobacco to the mouth of the smoker, with the mixing of the air causes the particulate matter and other impurities to be deposited in and on the cones, as well as the tubular member, as well as the sleeve, and reduces the amount of particulate that ultimately reaches the mouth of the smoker. It also cools the smoke and enhances its taste.
  • FIG. 3 shows the construction aforedescribed as an integral part of a cigarette and will not be redescribed, except that the parts in FIG. 3 which correspond to similar parts in FIGS. 1 and 2 will be given the same number primed.
  • the rear end 36 of the cigarette 38 is positioned adjacent and somewhat beyond the front end 40 of the fibrous sleeve 24 with some of the tobacco of the cigarette entering the front end of the fibrous sleeve 24'.
  • a band 42 joins the rear end of the cigarette with the front of the sleeve 24 so that the two form an integral cigarette. Any other means of joining the cigarette with the rear end which forms the mouth of the cigarette may be employed.
  • FIG. 4 The FIG. 4 embodiment is generally similar to that shown in FIG. 2 and previously described, except that instead of having two separate hollow cone-shaped members as in FIGS. 2 and 3, the two hollow cone-shaped members are integrally molded and form a single unit, generally indicated at 44, resembling a diablo in which the apices of the cones are united, as shown.
  • the radial opening 46 in the front cone-shaped member 48 is positioned 180 from the radial opening 50 in the rear coneshaped member 52. The remaining structure and the function are as previously described.
  • a smoke-treating article comprising an elongated openended tubular member adapted to receive smoke from a buming tobacco article, said tubular member having a plurality of air-admitting, spaced-apart radial openings, a tubular porous open-ended sleeve surrounding at least partially said tubular member, a pair of hollow cone-shaped members positioned inside said tubular member with the open base end of one coneshaped member adjacent the front and the open base end of the other cone-shaped member adjacent the rear open ends respectively of the tubular member and the apex ends of the cone-shaped members facing and spaced from each other to define a turbulence zone, each said cone-shaped member being closed at its apex end to block axial passage of the smoke through its respective apex end, each cone-shaped member having a radial opening adjacent its respective apex end, the radial openings of the cone-shaped members being approximately 180 apart so as to face in opposite directions, the smoke entering the open end of the front cone-shaped

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)

Abstract

A cigarette or a cigarette holder for reducing the quantity of particulate, tar and nicotine, provide a cooler smoke, and considerably reduce toxic gases. It includes an apertured tubular member surrounded by a porous fibrous sleeve and a pair of generally cone-shaped members, one at the entrance end of the tubular member and the other at the exit or discharge end of the tubular member, with each cone-shaped member having a radial opening spaced from the inside of the tubular member and positioned approximately 180* from each other so that the smoke passing through the entrance cone is directed into the tubular member and mixed with air drawn thereinto and discharged through the radial opening in the exit cone-shaped member. The apices of the cone-shaped members may abut or may be mutually spaced along the longitudinal axis of the holder.

Description

Waite States Patet Doppelt, deceased Mar. 7,1972
[54] CIGARETTE AND/OR CIGARETTE HOLDER [72] Inventor: Max J. Doppelt, deceased, late of Chicago,
Ill. by Jay A. Pritzker, administrator [63] Continuation-in-part of Ser. No. 800,500, Feb. 19,
1969, Pat. No. 3,504,677.
3,395,714 8/1968 Kahane ..131/209 X 3,490,465 1/1970 Kalbfeld ..131/198 X FOREIGN PATENTS OR APPLlCATIONS 23,715 10/1918 Denmark ..131/211 1,127,550 8/1956 France ..131/9 17,181 0/1912 Great Britain..... ...131/211 234,019 5/1925 Great Britain ..131/204 314,218 6/1929 Great Britain ..131/212 644,148 10/1950 Great Britain ..131/211 Primary ExaminerJoseph S. Reich Att0rneyMax R. Kraus and Silverman & Cass [57] ABSTRACT A cigarette or a cigarette holder for reducing the quantity of particulate, tar and nicotine, provide a cooler smoke, and considerably reduce toxic gases. It includes an apertured tubular member surrounded by a porous fibrous sleeve and a pair of generally cone-shaped members, one at the entrance end of the tubular member and the other at the exit or discharge end of the tubular member, with each cone-shaped member having a radial opening spaced from the inside of the tubular member and positioned approximately 180 from each other so that the smoke passing through the entrance cone is directed into the tubular member and mixed with air drawn thereinto and discharged through the radial opening in the exit cone-shaped member. The apices of the cone-shaped members may abut or may be mutually spaced along the longitudinal axis of the holder.
3 Claims, 4 Drawing Figures CIGARETTE AND/OR CIGARETTE HOLDER This application is a continuation-in-part of application Ser. No. 800,500, filed Feb. 19, 1969 now U.S. Pat. No. 3,504,677 issued Apr. 7, 1970.
BRIEF SUMMARY OF THE INVENTION Briefly, the cigarette and/or cigarette holder formed with this invention includes a tubular member provided with a plurality of apertures, a porous sleeve surrounding said tubular member to enclose same, and a pair of generally cone-shaped members extending inwardly into said tubular member, one of said cone-shaped members being at the entrance end of the tubular member and the other at the exit thereof, with each cone-shaped member having at least one radial opening spaced 180 from the other so that the smoke entering the entrance cone-shaped member passes through the radial opening into the interior of the tubular member where it is mixed with air drawn through the sleeve into the tubular member and then passes out through the exit tubular member through said radial opening. The smoke that passes from the tobacco end to the mouth of the smoker will travel a tortuous path and will deposit the particulate matter, such as the tar and nicotine in the article and will greatly reduce the amount of such matter that enters the mouth of the smoker. In addition, the smoke will be cooler and have a less objectionable smoking taste.
BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:
FIG. 1 is a side elevational view of the invention as embodied in a cigarette holder.
FIG. 2 is an enlarged cross-sectional view of FIG. 1 taken on the longitudinal center thereof.
FIG. 3 is a central sectional view of a cigarette embodying the invention, and
FIG. 4 is a view similar to FIG. 2 but of a modified embodiment.
DESCRIPTION OF THE CIGARETTE HOLDER AND CIGARETTE SHOWN IN FIGS. 1 AND 2 The cigarette holder, generally indicated at 10, includes a tubular member 12 made of plastic or the like, provided with spaced radial openings 14. Positioned inside the tubular member 12 are two hollow cone-shaped members, preferably made of plastic. One of said cone-shaped members is designated by the numeral 16 and is positioned inside the tubular member inwardly of but adjacent the entrance or front thereof, and the other cone-shaped member 18 is positioned adjacent the exit or rear end of the tubular member.
The cone-shaped member 16 adjacent the entrance of tubular member 12 is provided with at least one radial opening 20 and it will be seen that said radial opening, best shown in FIG. 2, is spaced from the interior wall of the tubular member 12. The cone-shaped member 18 adjacent the exit end of the tubular member also has a radial opening 22 which is likewise spaced from the interior wall of the tubular member 12. The radial opening 20 of the entrance cone is spaced approximately 180 from the radial opening 22 in the exit cone. The two cone members 16 and 18 are positioned inside the tubular member 12, as shown in FIG. 2, and are spaced axially from each other and may be secured by friction means or may be positively secured to the tubular plastic member 12. A fibrous sleeve 24 surrounds the plastic tubular member 12. The said sleeve 24 is a tubular fibrous member which is porous and absorbent and is made from a paper made from natural fibers, which is both porous and absorbent. It could extend over the length of the tubular member 12 but, as shown in FIG. 2, is short thereof, The front end 26 of the tubular member 12 extends forwardly of the cone 16 to provide a pocket 28 for receiving a cigarette 30.
The smoke as it enters the front cone 16 is constricted and converges to a reduced area at the tip 32 of the cone and is blocked from moving in its normal axial path. It has to change its direction to pass radially out of the cone through the radial opening 20 into the tubular chamber 34 where it expands and mixes with the fresh air drawn thereinto through the sleeve 24 and tortuous openings 14. This movement produces a turbulence in the chamber 34. As the smoke moves in an axial direction in chamber 34 it must enter radial opening 22, positioned from radial opening 20. The smoke is constricted as it enters opening 22 and changes its flow to a radial flow into the rear cone, after which the smoke changes its direction to an axial flow and diverges as it passes out of the rear cone to the mouth of the smoker. This continuous changing of the direction of the flow of the smoke through a tortuous path as it passes from the tobacco to the mouth of the smoker, with the mixing of the air, causes the particulate matter and other impurities to be deposited in and on the cones, as well as the tubular member, as well as the sleeve, and reduces the amount of particulate that ultimately reaches the mouth of the smoker. It also cools the smoke and enhances its taste.
FIG. 3 shows the construction aforedescribed as an integral part of a cigarette and will not be redescribed, except that the parts in FIG. 3 which correspond to similar parts in FIGS. 1 and 2 will be given the same number primed. In the cigarette shown in FIG. 3, the rear end 36 of the cigarette 38 is positioned adjacent and somewhat beyond the front end 40 of the fibrous sleeve 24 with some of the tobacco of the cigarette entering the front end of the fibrous sleeve 24'. A band 42 joins the rear end of the cigarette with the front of the sleeve 24 so that the two form an integral cigarette. Any other means of joining the cigarette with the rear end which forms the mouth of the cigarette may be employed.
FIGURE 4 The FIG. 4 embodiment is generally similar to that shown in FIG. 2 and previously described, except that instead of having two separate hollow cone-shaped members as in FIGS. 2 and 3, the two hollow cone-shaped members are integrally molded and form a single unit, generally indicated at 44, resembling a diablo in which the apices of the cones are united, as shown. The radial opening 46 in the front cone-shaped member 48 is positioned 180 from the radial opening 50 in the rear coneshaped member 52. The remaining structure and the function are as previously described.
What is claimed is:
l. A smoke-treating article comprising an elongated openended tubular member adapted to receive smoke from a buming tobacco article, said tubular member having a plurality of air-admitting, spaced-apart radial openings, a tubular porous open-ended sleeve surrounding at least partially said tubular member, a pair of hollow cone-shaped members positioned inside said tubular member with the open base end of one coneshaped member adjacent the front and the open base end of the other cone-shaped member adjacent the rear open ends respectively of the tubular member and the apex ends of the cone-shaped members facing and spaced from each other to define a turbulence zone, each said cone-shaped member being closed at its apex end to block axial passage of the smoke through its respective apex end, each cone-shaped member having a radial opening adjacent its respective apex end, the radial openings of the cone-shaped members being approximately 180 apart so as to face in opposite directions, the smoke entering the open end of the front cone-shaped member axially and passing thereafter through the radial opening adjacent the apex end thereof radially into the turbulence zone of the tubular member where the smoke moves axially and is mixed with air drawn into the tubular member through said radial openings in the tubular member and the smoke then passing radially into the radial opening adjacent the apex end of the rear cone-shaped member and then axially through the open end of the rear cone-shaped member into the mouth of the smoker.
2. A smokers article as defined in claim 1 in which the tubular member and the cone-shaped members are formed of a plastic material.

Claims (3)

1. A smoke-treating article comprising an elongated open-ended tubular member adapted to receive smoke from a burning tobacco article, said tubular member having a plurality of air-admitting, spaced-apart radial openings, a tubular porous open-ended sleeve surrounding at least partially said tubular member, a pair of hollow cone-shaped members positioned inside said tubular member with the open base end of one cone-shaped member adjacent the front and the open base end of the other cone-shaped member adjacent the rear open ends respectively of the tubular member and the apex ends of the cone-shaped members facing and spaced from each other to define a turbulence zone, each said coneshaped member being closed at its apex end to block axial passage of the smoke through its respective apex end, each cone-shaped member having a radial opening adjacent its respective apex end, the radial openings of the cone-shaped members being approximately 180* apart so as to face in opposite directions, the smoke entering the open end of the front cone-shaped member axially and passing thereafter through the radial opening adjacent the apex end thereof radially into the turbulence zone of the tubular member where the smoke moves axially and is mixed with air drawn into the tubular member through said radial openings in the tubular member and the smoke then passing radially into the radial opening adjacent the apex end of the rear cone-shaped member and then axially through the open end of the rear cone-shaped member into the mouth of the smoker.
2. A smoker''s article as defined in claim 1 in which the tubular member and the cone-shaped members are formed of a plastic material.
3. A smoker''s article as defined in claim 1 in which the tobacco article is connected to said tubular member as to form a cigarette.
US857740A 1969-09-15 1969-09-15 Cigarette and/or cigarette holder Expired - Lifetime US3646941A (en)

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771535A (en) * 1972-01-07 1973-11-13 Artmor Services Inc Disposable cigarette holders
DE3400004A1 (en) * 1984-01-02 1985-07-18 B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg VENTILATION ELEMENT FOR A SMOKABLE ARTICLE
DE3428697A1 (en) * 1984-08-03 1986-02-13 B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg Filter for a smokable article
EP0222973A1 (en) * 1985-10-22 1987-05-27 EFKA-Werke Fritz Kiehn GmbH Filter cigarette, filter cigarette tube or the like, optionally with a ventilation zone, and method for making such a cigarette or tube for a cigarette
EP0327655A1 (en) * 1988-02-10 1989-08-16 Hans Elstner Smoke filter, particularly for tobacco pipes
US5113878A (en) * 1989-07-13 1992-05-19 Pasquale Polese Cigarette-holder including a filter, suitable to wean smokers from the habit of smoking
US6502580B1 (en) * 1997-09-23 2003-01-07 Alessandro Leonetti Luparini Hypobaric cigarette filter device
US20070235050A1 (en) * 2006-03-28 2007-10-11 Philip Morris Usa Inc. Smoking article with a restrictor
US20080035162A1 (en) * 2006-08-08 2008-02-14 Philip Morris Usa Inc. Smoking article with single piece restrictor and chamber
US20080047571A1 (en) * 2006-07-12 2008-02-28 Philip Morris Usa Inc. Smoking article with plate impactor
US20080216850A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Restrictor attachment for unfiltered smoking article
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
US20100288293A1 (en) * 2009-05-18 2010-11-18 Philip Morris Usa Inc. Smoking article with improved flow restriction element
US20110083675A1 (en) * 2009-10-09 2011-04-14 Philip Morris Usa Inc. Smoking article with valved restrictor
CN102742937A (en) * 2012-06-21 2012-10-24 杨明学 Filtering cigarette holder
US8353302B2 (en) 2007-03-09 2013-01-15 Philip Morris Usa Inc. Smoking articles with restrictor and aerosol former
US8353298B2 (en) 2006-07-12 2013-01-15 Philip Morris Usa Inc. Smoking article with impaction filter segment
US9138016B2 (en) 2010-03-26 2015-09-22 Philip Morris Usa Inc. Smoking articles with significantly reduced gas vapor phase smoking constituents
CN105105331A (en) * 2015-09-22 2015-12-02 浙江凯实激光科技股份有限公司 Built-in type smoke purifying filter
CN106572698A (en) * 2014-08-07 2017-04-19 日本烟草产业株式会社 Cigarette with filter
US20180360105A1 (en) * 2016-12-05 2018-12-20 Eugene Higgins Filter Cigarette Holder
US20220104538A1 (en) * 2020-10-01 2022-04-07 Mark McWilliams Easy-care smoking apparatus having a disposable bowl liner

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US1239589A (en) * 1916-06-21 1917-09-11 Robert Wesley Graves Tobacco-pipe.
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US2001612A (en) * 1932-09-17 1935-05-14 Jacquemin Marcel Charles Henri Pipe for smoking
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Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771535A (en) * 1972-01-07 1973-11-13 Artmor Services Inc Disposable cigarette holders
DE3400004A1 (en) * 1984-01-02 1985-07-18 B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg VENTILATION ELEMENT FOR A SMOKABLE ARTICLE
US4602647A (en) * 1984-01-02 1986-07-29 B.A.T. Cigaretten-Fabriken Gmbh Ventilating tip for a smokable article
DE3428697A1 (en) * 1984-08-03 1986-02-13 B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg Filter for a smokable article
EP0222973A1 (en) * 1985-10-22 1987-05-27 EFKA-Werke Fritz Kiehn GmbH Filter cigarette, filter cigarette tube or the like, optionally with a ventilation zone, and method for making such a cigarette or tube for a cigarette
EP0327655A1 (en) * 1988-02-10 1989-08-16 Hans Elstner Smoke filter, particularly for tobacco pipes
US5113878A (en) * 1989-07-13 1992-05-19 Pasquale Polese Cigarette-holder including a filter, suitable to wean smokers from the habit of smoking
US6502580B1 (en) * 1997-09-23 2003-01-07 Alessandro Leonetti Luparini Hypobaric cigarette filter device
US20070235050A1 (en) * 2006-03-28 2007-10-11 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
EP2007233B1 (en) * 2006-03-28 2019-08-14 Philip Morris Products S.A. Smoking article with a restrictor
US7878963B2 (en) 2006-03-28 2011-02-01 Philip Morris Usa Inc. Smoking article with a restrictor
US20080047571A1 (en) * 2006-07-12 2008-02-28 Philip Morris Usa Inc. Smoking article with plate impactor
US8353298B2 (en) 2006-07-12 2013-01-15 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
US8424539B2 (en) 2006-08-08 2013-04-23 Philip Morris Usa Inc. Smoking article with single piece restrictor and chamber
US8235057B2 (en) 2007-03-09 2012-08-07 Philip Morris Usa Inc. Smoking article with open ended filter and restrictor
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
US20080216853A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Smoking article with open ended filter and restrictor
US20080216848A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Smoking article filter with annular restrictor and downstream ventilation
US20080216850A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Restrictor attachment for unfiltered smoking article
WO2010133334A1 (en) * 2009-05-18 2010-11-25 Philip Morris Products S.A. Smoking article with improved flow restriction element
EP2253231A1 (en) * 2009-05-18 2010-11-24 Philip Morris Products S.A. Smoking article with improved flow restriction element
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