CA939225A - Tobacco-smoke filters - Google Patents

Tobacco-smoke filters

Info

Publication number: CA939225A
Authority: CA; Canada
Prior art keywords: tobacco; smoke filters; smoke; filters
Prior art date: 1970-10-07
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

CA123,305A

Other versions

CA123305S (en

Inventor

Fred Haslam

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.)

British American Tobacco Investments Ltd

Original Assignee

British American Tobacco Co Ltd

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.)

1970-10-07

Filing date

1971-09-21

Publication date

1974-01-01

1971-09-21 Application filed by British American Tobacco Co Ltd filed Critical British American Tobacco Co Ltd

1974-01-01 Application granted granted Critical

1974-01-01 Publication of CA939225A publication Critical patent/CA939225A/en

Status Expired legal-status Critical Current

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
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0229—Filter rod forming processes
- A24D3/0237—Filter rod forming processes by extrusion

CA123,305A 1970-10-07 1971-09-21 Tobacco-smoke filters Expired CA939225A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB4770770		1970-10-07

Publications (1)

Publication Number	Publication Date
CA939225A true CA939225A (en)	1974-01-01

Family

ID=10445984

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA123,305A Expired CA939225A (en)	1970-10-07	1971-09-21	Tobacco-smoke filters

Country Status (7)

Country	Link
AU (1)	AU460006B2 (en)
BE (1)	BE773622A (en)
CA (1)	CA939225A (en)
CH (1)	CH544514A (en)
GB (1)	GB1331096A (en)
NL (1)	NL172021B (en)
ZA (1)	ZA716273B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4282890A (en) *	1978-03-13	1981-08-11	Celanese Corporation	Open cell structure foamed cellulose acetate filters
ES2603646T3 (en) †	2008-05-21	2017-02-28	R.J. Reynolds Tobacco Company	Cigarette filter that has composite fiber structures
GB201112539D0 (en)	2011-07-21	2011-08-31	British American Tobacco Co	Porous carbon and methods of production thereof
US11291242B2 (en)	2019-08-28	2022-04-05	Aiger Group Ag	Apparatus and method for forming a smoke filter

1970
- 1970-10-07 GB GB4770770A patent/GB1331096A/en not_active Expired
1971
- 1971-09-20 ZA ZA716273A patent/ZA716273B/en unknown
- 1971-09-21 CA CA123,305A patent/CA939225A/en not_active Expired
- 1971-09-24 AU AU33886/71A patent/AU460006B2/en not_active Expired
- 1971-10-01 NL NLAANVRAGE7113503,A patent/NL172021B/en not_active IP Right Cessation
- 1971-10-06 CH CH1450971A patent/CH544514A/en not_active IP Right Cessation
- 1971-10-07 BE BE773622A patent/BE773622A/en unknown

Also Published As

Publication number	Publication date
NL172021B (en)	1983-02-01
DE2149434A1 (en)	1972-05-10
CH544514A (en)	1973-11-30
AU3388671A (en)	1973-03-29
NL7113503A (en)	1972-04-11
DE2149434B2 (en)	1976-05-06
ZA716273B (en)	1972-05-31
AU460006B2 (en)	1975-04-10
GB1331096A (en)	1973-09-19
BE773622A (en)	1972-01-31

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