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US20030066539A1 - Cigarette Filter - Google Patents

Cigarette Filter Download PDF

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Publication number
US20030066539A1
US20030066539A1 US10/011,841 US1184101A US2003066539A1 US 20030066539 A1 US20030066539 A1 US 20030066539A1 US 1184101 A US1184101 A US 1184101A US 2003066539 A1 US2003066539 A1 US 2003066539A1
Authority
US
United States
Prior art keywords
filter
cigarette filter
section
general
plug
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.)
Abandoned
Application number
US10/011,841
Other languages
English (en)
Inventor
James Figlar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brown and Williamson Holdings Inc
Original Assignee
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
Application filed by Individual filed Critical Individual
Priority to US10/011,841 priority Critical patent/US20030066539A1/en
Assigned to BROWN & WILLIAMSON TOBACCO CORPORATION, A CORP. OF DELAWARE reassignment BROWN & WILLIAMSON TOBACCO CORPORATION, A CORP. OF DELAWARE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FIGLAR, JAMES N.
Assigned to BROWN & WILLIAMSON TOBACCO CORPORATION reassignment BROWN & WILLIAMSON TOBACCO CORPORATION INVALID ASSIGNMENT. SEE RECORDING AT REEL 012604, FRAME 0418. (RE-RECORDED TO CORRECT RECORDATION DATE FROM 11-7-01 TO 10/30/01) Assignors: FIGLAR, JAMES N.
Priority to MXPA04001044A priority patent/MXPA04001044A/es
Priority to CA002454820A priority patent/CA2454820C/fr
Priority to EP02756831A priority patent/EP1411784B8/fr
Priority to OA1200400032A priority patent/OA12647A/en
Priority to YUP-112/04A priority patent/RS51032B/sr
Priority to KR1020047001625A priority patent/KR100838207B1/ko
Priority to AT02756831T priority patent/ATE527901T1/de
Priority to NZ531256A priority patent/NZ531256A/en
Priority to US10/485,479 priority patent/US20040237984A1/en
Priority to ES02756831T priority patent/ES2375106T3/es
Priority to JP2003520314A priority patent/JP4028483B2/ja
Priority to PL368136A priority patent/PL200589B1/pl
Priority to HU0401565A priority patent/HUP0401565A3/hu
Priority to APAP/P/2004/002985A priority patent/AP2134A/en
Priority to TW091117045A priority patent/TWI239237B/zh
Priority to HRP20040166AA priority patent/HRP20040166B1/hr
Priority to BRPI0211853-0A priority patent/BR0211853B1/pt
Priority to EA200400191A priority patent/EA005323B1/ru
Priority to AU2002322811A priority patent/AU2002322811B2/en
Priority to PCT/US2002/024240 priority patent/WO2003015544A1/fr
Priority to IL16015002A priority patent/IL160150A0/xx
Priority to CNB028176693A priority patent/CN100496312C/zh
Priority to MYPI20022886A priority patent/MY128508A/en
Priority to ARP020102923A priority patent/AR034967A1/es
Priority to EG2002080870A priority patent/EG23137A/xx
Publication of US20030066539A1 publication Critical patent/US20030066539A1/en
Priority to IL160150A priority patent/IL160150A/en
Priority to NO20040452A priority patent/NO20040452L/no
Priority to ZA2004/01077A priority patent/ZA200401077B/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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
    • A24D3/12—Use of materials for tobacco smoke filters of ion exchange 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

Definitions

  • the present invention relates to a cigarette filter that includes a smoke constituent adsorbent which, when combined with a carbon-based filtering material, demonstrates synergistic reductions in smoke vapor constituents.
  • Cigarettes include tobacco rods or columns which, when burned, produce a particulate phase and a vapor phase.
  • filters began to be attached to an end of the tobacco column to, among other things, reduce various smoke components.
  • Filters made from filamentary or fibrous material, such as cellulose acetate tow or paper reduce the particulate phase of tobacco smoke by mechanical means.
  • the fibrous materials are not effective at reducing volatile constituents found in the vapor phase, such as aldehydes, hydrogen cyanide and sulfides.
  • an adsorbent or absorbent is typically combined with the fibrous filter material.
  • Charcoal has a high surface area and is a relatively strong adsorbent for vapor-phase constituents of tobacco smoke. When coated with a mixture of metallic oxides, charcoal is particularly effective in reducing acidic gases. Meerschaum has a large adsorption area with a strong adsorption affinity for charged species, but meerschaum has a considerably low adsorption affinity for non-polar species. Silica gels are generally regarded as weakly retentive adsorbents for vapor-phase constituents of tobacco smoke. Although silica gel readily adsorbs aldehydes and hydrogen cyanide, the constituents also readily desorb from the silica gel. Cation exchange resins have been proposed for nicotine removal.
  • Anion exchange resins have been proposed for the removal of smoke acids, but strongly basic anion exchangers have no effect on smoke vapor phase aldehydes, and weakly basic ion exchange resins—in free base form or as strong, inorganic acid salts thereof—either lack vapor phase filtration properties or have an associated ammonia-based odor which undesirably influences the flavor of tobacco smoke.
  • Weakly basic anion-exchange resins of porous structure are suitable for the removal of smoke acids, but their efficiency diminishes during smoking, as does that of carbon and porous minerals.
  • adsorbents can be used in combination in cigarette filters.
  • U.S. Pat. No. 2,815,760 teaches the use of an ion exchange material with materials which “chemically react with the harmful, nonalkaline and nonacid components of the smoke to form non-volatile compounds, thus retaining the latter to the filter.”
  • the aforesaid additives have not yielded satisfactory selective removal of such smoke phase components as smoke aldehydes, particularly acetaldehyde and acrolein.
  • 4,300,577 teaches the use of a weakly retentive absorbent for vapor-phase constituents intermingled with a second component having mainly primary amine functional groups for the removal of vapor-phase constituents, including aldehydes and hydrogen cyanide from tobacco smoke.
  • a weakly retentive absorbent for vapor-phase constituents intermingled with a second component having mainly primary amine functional groups for the removal of vapor-phase constituents, including aldehydes and hydrogen cyanide from tobacco smoke.
  • the filter of the '577 patent has not been shown to demonstrate adequate consumer acceptance or commercial viability.
  • the present invention relates to a cigarette filter that includes a multiple section filter which reduces the level of predetermined smoke constituents.
  • the filter consists of a fibrous filter plug located at the mouth-end of the cigarette, a section containing a selective adsorbent material, and a section containing a general adsorbent material.
  • the filter plug can be made from any filter plug material known in the art, such as cellulose acetate tow.
  • the general adsorbent material is preferably selected from a group of relatively high surface area materials, such as activated charcoal, which are capable of adsorbing a range of chemical compounds without a high degree of specificity.
  • the selective adsorbent material is chosen based on the specific smoke constituents targeted for removal.
  • the selective adsorbent material is selected from a group of surface functionalized resins, wherein each resin consists of an essentially inert carrier having a sufficient surface area to adsorb the specific smoke constituents.
  • the selective adsorbent material has a phenol-formaldehyde resin matrix surface-functionalized with mainly primary and secondary amine functional groups.
  • the selective adsorbent material may be positioned adjacent to a tobacco rod and the general adsorbent material positioned between the selective adsorbent section and the filter plug.
  • the general adsorbent material may be positioned adjacent to the tobacco rod and the selective adsorbent material positioned between the general adsorbent section and the filter plug.
  • the selective adsorbent and general adsorbent may be interspersed in a traditional filter plug material, such as cellulose acetate, or the adsorbents may be in a close-packed bed or thin layer section within the filter plug material.
  • FIG. 1 is an exploded view of a prior art filter-tipped cigarette
  • FIG. 2 is a perspective view of a filter for a cigarette made in accordance with the present invention wherein the adsorbents are dispersed throughout a filter plug material, and the general adsorbent section is positioned between the filter plug and the selective adsorbent section;
  • FIG. 3 is a perspective view of a filter for a cigarette made in accordance with the present invention wherein the adsorbents are dispersed throughout a filter plug material, and the selective adsorbent section is positioned between the filter plug and the general adsorbent section; and
  • FIG. 4 is a perspective view of a filter for a cigarette made in accordance with the present invention wherein the adsorbents are packed as beds within a segment of a filter plug material.
  • the cigarette filter of the present invention includes a multiple section filter which reduces the levels of predetermined smoke constituents.
  • the filter consists of a fibrous filter plug located at the mouth-end of the cigarette, a section containing a selective adsorbent material, and a section containing a general adsorbent material.
  • a typical filter-tipped cigarette 10 has a filter 30 attached to a tobacco rod 20 .
  • the tobacco rod 20 consists of a loose tobacco-containing mixture 22 wrapped in a cigarette paper 24
  • the filter 30 includes a filter plug 32 wrapped in a plug wrap 34 .
  • a sheet of tipping paper 36 joins the filter 30 to the tobacco rod 20 .
  • a cigarette 110 has a multiple section filter 130 attached to the tobacco rod 20 .
  • the filter 130 includes a filter plug 132 , a section containing a general adsorbent 134 and a section containing a selective adsorbent 136 wrapped in a plug wrap 135 .
  • the filter plug 132 is positioned near a first end 131 of the plug wrap 135
  • the selective adsorbent section 136 is positioned near a second end 137 .
  • the general adsorbent section 134 is sandwiched between the filter plug 132 and the selective adsorbent section 136 .
  • the plug wrap 135 forms a sheath around the filter segments 132 , 134 , 136 to hold the segments together for ease of handling.
  • the filter 130 is attached to the tobacco rod 20 such that the second end 137 is adjacent to the tobacco rod 20 .
  • the filter plug 132 is made from a filamentary or fibrous material and provides a clean, neat appearance at the mouth end 131 of the cigarette.
  • the filter plug 132 also retains a firmness at the mouth end 131 as the cigarette 110 is consumed.
  • the filter plug 132 can be made from a variety of materials, among the most common being cellulose, cellulose acetate tow, paper, cotton, polypropylene web, polypropylene tow, polyester web, polyester tow or combinations thereof.
  • a plasticizer may be included.
  • the filter plug 132 may carry liquid additives or flavoring agents, and it may include tubes or apertures at preselected positions to provide a more consumer acceptable product, as are known in the art. Functionally, the filter plug 132 captures particulate matter from the tobacco smoke as the cigarette 110 is burned.
  • the general adsorbent section 134 shown in FIG. 2, is positioned between the filter plug 132 and the selective adsorbent section 136 of the cigarette filter 130 and consists of a general adsorbent material 144 dispersed throughout a filter plug material 142 , such as in a “dalmatian” filter, known in the art.
  • the general adsorbent material 144 is preferably selected from a group of relatively high surface area materials which are capable of adsorbing smoke constituents without a high degree of specificity.
  • the general adsorbent can be selected from activated charcoal, activated coconut carbon, activated coal-based carbon, zeolite, silica gel, meerschaum, aluminum oxide or combinations thereof are among the more common general adsorbents known in the art.
  • Other general adsorbents which may be used include a coal-based charcoal made from semi-anthracite coal with a density about 50% greater than coconut-based charcoal (available from Calgon Carbon, Pittsburgh, Pa.), a carbonaceous resin derived from the pyrolysis of sulfonated styrene-divinylbenzene, such as Ambersorb 572 or Ambersorb 563 (available from Rohm and Haas, 5000 Richmond Street, Philadelphia, Pa.
  • metal oxides or other metal-based complex may optionally be included in or impregnated on the general adsorbent section.
  • the selective adsorbent section 136 is positioned near the tobacco rod end 137 of the filter 130 and consists of a selective adsorbent material 146 dispersed throughout a filter plug material 142 , such as in a “dalmatian” filter, known in the art.
  • the selective adsorbent material 146 is preferably selected based on the material's 146 specificity for a predetermined class of chemical compounds.
  • the selective adsorbent material 146 may be an ion-exchange resin, such as Duolite A7 (available from Rohm and Haas, 5000 Richmond Street, Philadelphia, Pa. 19137), or a material having similar functional groups and binding affinities.
  • the Duolite A7 has a phenol-formaldehyde resin matrix and is surface-functionalized with primary and secondary amine groups, thereby enhancing the resin's specificity toward the aldehydes and hydrogen cyanide found in tobacco smoke.
  • the selective adsorbent material 146 must be selected taking into consideration that the contact conditions between the tobacco smoke and the adsorbent 146 are dependent on a number of variables, including how strongly the smoker draws the smoke through the filter as the cigarette is being smoked and how much of the tobacco rod has been consumed prior to each puff.
  • the selective adsorbent 146 have a sufficient surface area to ensure that the surface functional sites are easily accessible but such that there is minimal diffusional resistance.
  • a resin having a surface area of greater than about 35 m 2 /g can adsorb the smoke constituents and minimize the probability of the resin packing so tightly that the smoke stream is impeded as it passes through the filter.
  • materials with greater surface areas also demonstrate less noticeable performance decline if part of the surface is covered with a plasticizer, as might occur when the adsorbent 146 is dispersed in the filter plug 142 .
  • the tobacco smoke is inhaled by the smoker through the filter 130 .
  • the smoke initially passes over the selective adsorbent section 136 where the targeted smoke constituents are adsorbed on the surface of the selective adsorbent material 146 and particulate matter in the smoke is retained by the filter plug material 142 .
  • the remaining smoke then passes over the general adsorbent section 134 where other polarized constituents may be retained by the adsorbent material 144 and additional particulate matter is retained by the filter plug material 142 .
  • the remaining smoke then passes through the filter plug 132 where additional particulate matter can be reduced.
  • the filtered smoke is then delivered to the smoker.
  • a cigarette 210 includes a multiple section filter 230 with the filter plug 132 positioned at the mouth end 131 , the general adsorbent section 134 positioned near the tobacco-rod end 137 , and the selective adsorbent section 136 sandwiched between the filter plug 132 and the general adsorbent section 134 .
  • the smoke vapor first passes through the general adsorbent section 134 , then through the selective adsorbent section 136 , and finally through the filter plug 132 .
  • the selective adsorbent material 146 and the general adsorbent material 144 are dispersed throughout the filter tow 142 . Dispersion of the adsorbents 144 , 146 provides some advantages from a production perspective. Specifically, when the adsorbents 144 , 146 are dispersed within the tow 142 , the adsorbents are easier to handle than they are as loose particles.
  • a cigarette 310 includes a filter 330 wherein the adsorbents 144 , 146 are packed within the filter plug material 142 as a close-packed bed or thin layer section of general adsorbent 344 and as a close-packed bed or thin layer section of selective adsorbent 346 .
  • a bed of general adsorbent 344 may be combined with a “dalmatian” specific adsorbent section 136 , or a bed of specific adsorbent 346 may be combined with a “dalmatian” general adsorbent section 134 .
  • the adsorbent bed 344 , 346 may be either adjacent to the tobacco rod 20 or sandwiched between the “dalmatian” section 134 , 136 and the filter plug 132 .
  • the filter plug 132 is positioned at the mouth-end of the filter, with the general adsorbent section and the selective adsorbent section positioned between the filter plug and the tobacco rod.
  • This configuration is expected to be the most consumer acceptable because the adsorbent materials are not visible to the consumer.
  • the filter would function as intended if either the general adsorbent section or the selective adsorbent section was positioned at the mouth-end of the filter.
  • the term “filter plug” as used herein refers to a dispersion of the filter plug material, and as such, the filter plug may be contiguous with the general adsorbent section and / or with the selective adsorbent section.
  • an advantage of the cigarette 110 of FIG. 2 as compared to the alternative cigarette 210 of FIG. 3 is that the smoke passes over the selective adsorbent material 146 before passing over the general adsorbent 144 .
  • This allows the selective adsorbent 146 to reduce some specific smoke constituents before the general adsorbent 144 is exposed to the smoke, thereby allowing the general adsorbent 144 to be more effective in reducing the remaining smoke constituents.
  • a cellulose acetate/40 mg charcoal/40 mg Duolite A7 filter 130 attached to a tobacco rod 20 designed to deliver about 10 mg tar is more effective at reducing hydrogen cyanide, methanol, crotonaldehyde, acrolein, acetaldehyde, propionaldehyde, acetonitrile, methyl ethyl ketone, hydrogen sulfide, propionitrile, acetone, 2-methylpropanal, benzene, toluene, isoprene, furan, acrylonitrile, 1,3-butadiene, and carbon disulfide than a cellulose acetate/40 mg Duolite A7/40 mg charcoal filter 230 attached to a tobacco rod 20 designed to deliver about 10 mg tar.
  • a multiple section filter 110 is prepared as shown in FIG. 2 wherein the filter plug 132 is made of cellulose acetate tow and is about 7 mm in length, the general adsorbent section 134 consists of about 40 mg of activated coconut charcoal 144 dispersed throughout plasticizer-treated cellulose acetate tow 142 cut to deliver a section 134 about 10 mm in length, and the selective adsorbent section 136 consists of about 40 mg of Duolite A7 dispersed throughout plasticizer-treated cellulose acetate tow 142 cut to deliver a section 136 about 10 mm in length.
  • the filter is attached to a tobacco rod 20 having a length of about 83.5 mm and containing about 617 mg of a typical non-menthol cigarette blend wrapped in a 50 Coresta cigarette paper with about 1.8% citrate.
  • the cigarette delivers about 10.3 mg tar per cigarette.
  • a multiple section filter 210 is prepared with the section orientations as shown in FIG. 3 wherein the filter plug 232 , the general adsorbent section 234 , and the selective adsorbent section 236 are essentially identical to the filter plug 132 , the general adsorbent section 134 , and the selective adsorbent section 136 of Example 1.
  • the filter is attached to a tobacco rod 20 having a length of about 83.5 mm and containing about 617 mg of a typical non-menthol cigarette blend wrapped in a 50 Coresta cigarette paper with about 1.8% citrate.
  • the cigarette delivers about 10.0 mg tar per cigarette.
  • Cigarettes are prepared as in Example 1 except that about 20 mg Duolite A7 is used in the selective adsorbent section 136 instead of 40 mg. The cigarette delivers about 10.2 mg tar per cigarette.
  • Cigarettes are prepared as in Example 2 except that about 20 mg Duolite A7 is used in the selective adsorbent section 136 instead of 40 mg. The cigarette delivers about 10.9 mg tar per cigarette.
  • Cigarettes are prepared as in Example 1 except that about 60 mg Duolite A7 is used in the selective adsorbent section 136 instead of 40 mg. The cigarette delivers about 10.0 mg tar per cigarette.
  • Cigarettes are prepared as in Example 2 except that about 60 mg Duolite A7 is used in the selective adsorbent section 136 instead of 40 mg. The cigarette delivers about 10.3 mg tar per cigarette.
  • Cigarettes are prepared as in Example 1 except that about 69 mg of a coal-based charcoal made from semi-anthracite coal is used in the general adsorbent section 136 instead of 40 mg of activated coconut charcoal.
  • the cigarette delivers about 10.1 mg tar per cigarette.
  • Cigarettes are prepared as in Example 2 except that about 69 mg of a coal-based charcoal made from semi-anthracite coal is used in the general adsorbent section 136 instead of 40 mg of activated coconut charcoal.
  • the cigarette delivers about 10.2 mg tar per cigarette.
  • Example 1-8 Representative cigarettes of Examples 1-8 are smoked to a butt length of about 4 mm using a Borgwalt RM-20 smoking machine. Following the procedures set forth by the FTC, smoke constituents exiting the filter end of each cigarette are passed through a Cambridge filter pad, the vapor phase is collected in a bag and analyzed by GC/MS. The average vapor phase yields expressed in ⁇ g/cig are set forth in Table I.
  • the filter plug, the general adsorbent section, and the selective adsorbent section may vary in length and diameter, relative to any dimensions specified herein and relative to each other.
  • the various section dimensions may be optimized for a particular tobacco blend or for particular tobacco rod dimensions.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
US10/011,841 2001-08-01 2001-10-30 Cigarette Filter Abandoned US20030066539A1 (en)

Priority Applications (29)

Application Number Priority Date Filing Date Title
US10/011,841 US20030066539A1 (en) 2001-08-01 2001-10-30 Cigarette Filter
IL16015002A IL160150A0 (en) 2001-08-01 2002-07-30 Cigarette filter
CNB028176693A CN100496312C (zh) 2001-08-01 2002-07-30 卷烟过滤嘴
HU0401565A HUP0401565A3 (en) 2001-08-01 2002-07-30 Cigarette filter
HRP20040166AA HRP20040166B1 (hr) 2001-08-01 2002-07-30 Filter za cigarete
EP02756831A EP1411784B8 (fr) 2001-08-01 2002-07-30 Filtre de cigarette
OA1200400032A OA12647A (en) 2001-08-01 2002-07-30 Cigarette filter.
YUP-112/04A RS51032B (sr) 2001-08-01 2002-07-30 Filter za cigarete
KR1020047001625A KR100838207B1 (ko) 2001-08-01 2002-07-30 담배 필터
AT02756831T ATE527901T1 (de) 2001-08-01 2002-07-30 Zigarettenfilter
NZ531256A NZ531256A (en) 2001-08-01 2002-07-30 Cigarette filter with multiple filter sections
US10/485,479 US20040237984A1 (en) 2001-08-01 2002-07-30 Cigarette filter
ES02756831T ES2375106T3 (es) 2001-08-01 2002-07-30 Filtro para cigarrillo.
JP2003520314A JP4028483B2 (ja) 2001-08-01 2002-07-30 紙巻きタバコフィルタ
PL368136A PL200589B1 (pl) 2001-08-01 2002-07-30 Filtr papierosowy
MXPA04001044A MXPA04001044A (es) 2001-08-01 2002-07-30 Filtro de cigarrillo.
APAP/P/2004/002985A AP2134A (en) 2001-08-01 2002-07-30 Cigarette filter
TW091117045A TWI239237B (en) 2001-08-01 2002-07-30 Cigarette filter
CA002454820A CA2454820C (fr) 2001-08-01 2002-07-30 Filtre de cigarette
BRPI0211853-0A BR0211853B1 (pt) 2001-08-01 2002-07-30 filtro de cigarro.
EA200400191A EA005323B1 (ru) 2001-08-01 2002-07-30 Фильтр для сигарет
AU2002322811A AU2002322811B2 (en) 2001-08-01 2002-07-30 Cigarette filter
PCT/US2002/024240 WO2003015544A1 (fr) 2001-08-01 2002-07-30 Filtre de cigarette
MYPI20022886A MY128508A (en) 2001-08-01 2002-07-31 Cigarette filter
ARP020102923A AR034967A1 (es) 2001-08-01 2002-08-01 Filtro para cigarrillo
EG2002080870A EG23137A (en) 2001-08-01 2002-08-03 Cigarette filter
IL160150A IL160150A (en) 2001-08-01 2004-02-01 Cigarette filter
NO20040452A NO20040452L (no) 2001-08-01 2004-02-02 Sigarettfilter
ZA2004/01077A ZA200401077B (en) 2001-08-01 2004-02-10 Cigarette filter

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US30938801P 2001-08-01 2001-08-01
US30943501P 2001-08-01 2001-08-01
US10/011,841 US20030066539A1 (en) 2001-08-01 2001-10-30 Cigarette Filter

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/485,479 Continuation US20040237984A1 (en) 2001-08-01 2002-07-30 Cigarette filter

Publications (1)

Publication Number Publication Date
US20030066539A1 true US20030066539A1 (en) 2003-04-10

Family

ID=27359516

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/011,841 Abandoned US20030066539A1 (en) 2001-08-01 2001-10-30 Cigarette Filter
US10/485,479 Abandoned US20040237984A1 (en) 2001-08-01 2002-07-30 Cigarette filter

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/485,479 Abandoned US20040237984A1 (en) 2001-08-01 2002-07-30 Cigarette filter

Country Status (27)

Country Link
US (2) US20030066539A1 (fr)
EP (1) EP1411784B8 (fr)
JP (1) JP4028483B2 (fr)
KR (1) KR100838207B1 (fr)
CN (1) CN100496312C (fr)
AP (1) AP2134A (fr)
AR (1) AR034967A1 (fr)
AT (1) ATE527901T1 (fr)
AU (1) AU2002322811B2 (fr)
BR (1) BR0211853B1 (fr)
CA (1) CA2454820C (fr)
EA (1) EA005323B1 (fr)
EG (1) EG23137A (fr)
ES (1) ES2375106T3 (fr)
HR (1) HRP20040166B1 (fr)
HU (1) HUP0401565A3 (fr)
IL (2) IL160150A0 (fr)
MX (1) MXPA04001044A (fr)
MY (1) MY128508A (fr)
NO (1) NO20040452L (fr)
NZ (1) NZ531256A (fr)
OA (1) OA12647A (fr)
PL (1) PL200589B1 (fr)
RS (1) RS51032B (fr)
TW (1) TWI239237B (fr)
WO (1) WO2003015544A1 (fr)
ZA (1) ZA200401077B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004019709A3 (fr) * 2002-08-30 2004-07-01 Philip Morris Prod Filtres de cigarette comprenant des resines non fonctionnalisees, poreuses et polyaromatiques permettant d'eliminer des constituants en phase gazeuse de la fumee primaire
US20040231684A1 (en) * 2003-05-20 2004-11-25 Zawadzki Michael A. Smoking article and smoking article filter
US20060037621A1 (en) * 2000-11-10 2006-02-23 Bereman Robert D Method of making a smoking composition
US8752556B2 (en) 2006-03-10 2014-06-17 British American Tobacco (Investments) Limited Smoking article filter
CN104558371A (zh) * 2015-01-28 2015-04-29 云南中烟工业有限责任公司 一种聚丙烯酸气凝胶的滤嘴高效吸附棒及其制备方法
US10070664B2 (en) 2014-07-17 2018-09-11 Nicoventures Holdings Limited Electronic vapor provision system
US10368576B2 (en) 2014-03-28 2019-08-06 British American Tobacco (Investments) Limited Additive carrying composition

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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