GB1435504A - Cigarette filter - Google Patents
Cigarette filterInfo
- Publication number
- GB1435504A GB1435504A GB739572A GB739572A GB1435504A GB 1435504 A GB1435504 A GB 1435504A GB 739572 A GB739572 A GB 739572A GB 739572 A GB739572 A GB 739572A GB 1435504 A GB1435504 A GB 1435504A
- Authority
- GB
- United Kingdom
- Prior art keywords
- catalyst
- desiccant
- smoke
- filter
- water vapour
- 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
Links
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
- A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
Abstract
1435504 Smoke filter N WALD 17 May 1973 [17 Feb 1972] 7395/72 Headings A2C and A2M A filter for tobacco or tobacco substitute smoke includes means for removing part of the carbon monoxide content from smoke passing therethrough by the catalytic oxidation of CO to CO 2 , there being provided a desiccant, to protect the catalyst from wafer and water vapour. Preferably the CO is oxidised to CO 2 using hopcalite a 60/40 mixture of MnO 2 and CuO. The catalyst may have a surface area in excess of 150 m<SP>2</SP>/g and a particle size of 0.8 to 1.6 mm. The desiccant usually precedes the catalyst layer and thereby prevents the passage of water vapour through it. The desiccant may be SiO 2 or LiBr on a charcoal base. The catalyst may be incorporated in or on a fibrous material e.g. cellulose and may form part of a cigarette, cigar, pipe or cigarette holder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB739572A GB1435504A (en) | 1972-02-17 | 1972-02-17 | Cigarette filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB739572A GB1435504A (en) | 1972-02-17 | 1972-02-17 | Cigarette filter |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1435504A true GB1435504A (en) | 1976-05-12 |
Family
ID=9832297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB739572A Expired GB1435504A (en) | 1972-02-17 | 1972-02-17 | Cigarette filter |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1435504A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0354661A2 (en) * | 1988-08-12 | 1990-02-14 | British-American Tobacco Company Limited | Improvements relating to smoking articles |
WO1990010394A1 (en) * | 1989-03-16 | 1990-09-20 | R.J. Reynolds Tobacco Company | Catalyst containing smoking articles for reducing carbon monoxide |
GR890100237A (en) * | 1989-04-12 | 1991-09-27 | Reynolds Tobacco Co R | Catalyst containing smoking articles for reducing carbon monoxide |
US5501238A (en) * | 1993-01-11 | 1996-03-26 | Von Borstel; Reid W. | Cigarette filter containing a humectant |
US5746231A (en) * | 1993-01-11 | 1998-05-05 | Craig Lesser | Tobacco smoke filter for removing toxic compounds |
US5839447A (en) * | 1993-01-11 | 1998-11-24 | Lesser; Craig | Cigarette filter containing microcapsules and sodium pyroglutamate |
US6286516B1 (en) | 1998-04-16 | 2001-09-11 | Rothmans, Benson & Hedges Inc. | Cigarette sidestream smoke treatment material |
US6792953B2 (en) | 2000-09-12 | 2004-09-21 | Filligent Limited | Tobacco smoke filter |
US6810884B2 (en) | 2000-09-18 | 2004-11-02 | Rothmans, Benson & Hedges Inc. | Low sidestream smoke cigarette with non-combustible treatment material |
US7104265B2 (en) | 2003-02-18 | 2006-09-12 | Filligent Limited | Filter containing a metal phthalocyanine and a polycationic polymer |
EP2005849A2 (en) * | 2006-03-30 | 2008-12-24 | Japan Tobacco, Inc. | Method of treating tobacco mainstream smoke and smoking tool |
US20150296882A1 (en) * | 2012-12-07 | 2015-10-22 | Philip Morris Products S.A. | Smoking article with removable cap |
-
1972
- 1972-02-17 GB GB739572A patent/GB1435504A/en not_active Expired
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0712584A3 (en) * | 1988-08-12 | 1999-02-03 | British-American Tobacco Company Limited | Improvements relating to smoking articles |
EP0354661A3 (en) * | 1988-08-12 | 1991-08-07 | British-American Tobacco Company Limited | Improvements relating to smoking articles |
EP0354661A2 (en) * | 1988-08-12 | 1990-02-14 | British-American Tobacco Company Limited | Improvements relating to smoking articles |
EP0712584A2 (en) * | 1988-08-12 | 1996-05-22 | British-American Tobacco Company Limited | Improvements relating to smoking articles |
WO1990010394A1 (en) * | 1989-03-16 | 1990-09-20 | R.J. Reynolds Tobacco Company | Catalyst containing smoking articles for reducing carbon monoxide |
GR890100237A (en) * | 1989-04-12 | 1991-09-27 | Reynolds Tobacco Co R | Catalyst containing smoking articles for reducing carbon monoxide |
US6164288A (en) * | 1993-01-11 | 2000-12-26 | Craig Lesser | Cigarette filter containing dry water and microcapsules |
US6530377B1 (en) | 1993-01-11 | 2003-03-11 | Filligent Limited | Cigarette filter containing dry water and a porphyrin |
US5860428A (en) * | 1993-01-11 | 1999-01-19 | Craig Lesser | Cigarette filter containing a humectant |
US5746231A (en) * | 1993-01-11 | 1998-05-05 | Craig Lesser | Tobacco smoke filter for removing toxic compounds |
US5501238A (en) * | 1993-01-11 | 1996-03-26 | Von Borstel; Reid W. | Cigarette filter containing a humectant |
US5839447A (en) * | 1993-01-11 | 1998-11-24 | Lesser; Craig | Cigarette filter containing microcapsules and sodium pyroglutamate |
US6722373B2 (en) | 1998-04-16 | 2004-04-20 | Rothmans, Benson & Hedges Inc. | Cigarette sidestream smoke treatment material |
US6286516B1 (en) | 1998-04-16 | 2001-09-11 | Rothmans, Benson & Hedges Inc. | Cigarette sidestream smoke treatment material |
US6792953B2 (en) | 2000-09-12 | 2004-09-21 | Filligent Limited | Tobacco smoke filter |
US6810884B2 (en) | 2000-09-18 | 2004-11-02 | Rothmans, Benson & Hedges Inc. | Low sidestream smoke cigarette with non-combustible treatment material |
US6904918B2 (en) | 2000-09-18 | 2005-06-14 | Rothmans, Benson & Hedges Inc. | Low sidestream smoke cigarette with non-combustible treatment material |
US7104265B2 (en) | 2003-02-18 | 2006-09-12 | Filligent Limited | Filter containing a metal phthalocyanine and a polycationic polymer |
EP2005849A2 (en) * | 2006-03-30 | 2008-12-24 | Japan Tobacco, Inc. | Method of treating tobacco mainstream smoke and smoking tool |
EP2005849A4 (en) * | 2006-03-30 | 2012-12-26 | Japan Tobacco Inc | Method of treating tobacco mainstream smoke and smoking tool |
US20150296882A1 (en) * | 2012-12-07 | 2015-10-22 | Philip Morris Products S.A. | Smoking article with removable cap |
US10258084B2 (en) * | 2012-12-07 | 2019-04-16 | Philip Morris Products S.A. | Smoking article with removable cap |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |