GB1435504A - Cigarette filter - Google Patents

Cigarette filter

Info

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
Grant status
Application
Patent type
Prior art keywords
catalyst
desiccant
smoke
sp
gt
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
Application number
GB739572A
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.)
WALD N
Original Assignee
WALD N
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

Links

Classifications

    • 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
    • A24D3/06Use of materials for tobacco smoke filters
    • A24D3/16Use of materials for tobacco smoke filters of inorganic materials
    • A24D3/163Carbon
    • 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
    • A24D3/06Use of materials for tobacco smoke filters
    • A24D3/16Use 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.
GB739572A 1972-02-17 1972-02-17 Cigarette filter Expired GB1435504A (en)

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 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 (11)

* Cited by examiner, † Cited by third party
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
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

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0354661A3 (en) * 1988-08-12 1991-08-07 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
EP0712584A3 (en) * 1988-08-12 1999-02-03 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
WO1990010394A1 (en) * 1989-03-16 1990-09-20 R.J. Reynolds Tobacco Company Catalyst containing smoking articles for reducing carbon monoxide
US5839447A (en) * 1993-01-11 1998-11-24 Lesser; Craig Cigarette filter containing microcapsules and sodium pyroglutamate
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
US5860428A (en) * 1993-01-11 1999-01-19 Craig Lesser Cigarette filter containing a humectant
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
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

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee