GB1500921A – Cigarette filter
– Google Patents
GB1500921A – Cigarette filter
– Google Patents
Cigarette filter
Info
Publication number
GB1500921A
GB1500921A
GB12664/75A
GB1266475A
GB1500921A
GB 1500921 A
GB1500921 A
GB 1500921A
GB 12664/75 A
GB12664/75 A
GB 12664/75A
GB 1266475 A
GB1266475 A
GB 1266475A
GB 1500921 A
GB1500921 A
GB 1500921A
Authority
GB
United Kingdom
Prior art keywords
cigarette filter
march
water insoluble
filter comprises
hoechst
Prior art date
1974-03-28
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
GB12664/75A
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.)
Hoechst AG
Original Assignee
Hoechst AG
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.)
1974-03-28
Filing date
1975-03-26
Publication date
1978-02-15
1975-03-26
Application filed by Hoechst AG
filed
Critical
Hoechst AG
1978-02-15
Publication of GB1500921A
publication
Critical
patent/GB1500921A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
Abstract
1500921 Cigarette filter HOECHST AG 26 March 1975 [28 March 1974] 12664/75 Heading A2C A cigarette filter comprises at least in part cellulose ether which has been modified so that it is water insoluble but capable of absorbing water. Preferably the filter comprises carboxy methyl cellulose which has been rendered water insoluble by being cross-linked with dichloroacetic acid or dimethyl-methylene bis acrylamide.
GB12664/75A
1974-03-28
1975-03-26
Cigarette filter
Expired
GB1500921A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
CH430074A
CH583529A5
(en)
1974-03-28
1974-03-28
Publications (1)
Publication Number
Publication Date
GB1500921A
true
GB1500921A
(en)
1978-02-15
Family
ID=4273515
Family Applications (2)
Application Number
Title
Priority Date
Filing Date
GB39964/77A
Expired
GB1500922A
(en)
1974-03-28
1975-03-26
Cigarette filter
GB12664/75A
Expired
GB1500921A
(en)
1974-03-28
1975-03-26
Cigarette filter
Family Applications Before (1)
Application Number
Title
Priority Date
Filing Date
GB39964/77A
Expired
GB1500922A
(en)
1974-03-28
1975-03-26
Cigarette filter
Country Status (15)
Country
Link
US
(1)
US4015611A
(en)
JP
(1)
JPS50132197A
(en)
AT
(1)
AT337062B
(en)
AU
(1)
AU7951575A
(en)
BE
(1)
BE827144A
(en)
CA
(1)
CA1024032A
(en)
CH
(1)
CH583529A5
(en)
DE
(2)
DE2559542C3
(en)
DK
(1)
DK129875A
(en)
FR
(1)
FR2265291B1
(en)
GB
(2)
GB1500922A
(en)
LU
(1)
LU72140A1
(en)
NL
(1)
NL7503205A
(en)
SE
(1)
SE7503288L
(en)
ZA
(1)
ZA751935B
(en)
Families Citing this family (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CH586518A5
(en)
*
1975-10-10
1977-04-15
Hoechst Ag
US4140135A
(en)
*
1975-12-29
1979-02-20
Gulf & Western Corporation
Hydrophobic coating for tobacco sheet material
DE2606855C2
(en)
*
1976-02-20
1982-12-02
Bayer Ag, 5090 Leverkusen
Process for the preparation of propionic acid-3,4-dichloroanilide
FR2412272A1
(en)
*
1977-12-23
1979-07-20
Job Ets Bardou Job Pauilhac
PROCESS FOR THE REALIZATION OF CIGARETTE FILTERS AND FILTERS THUS OBTAINED
NO154418C
(en)
*
1978-11-30
1986-09-17
Siren M J O
FILTER MATERIAL.
US5817159A
(en)
*
1996-12-31
1998-10-06
Cahill; Scott A.
Filter with interpenetrating polymer network that biodegrades
WO2016108119A1
(en)
2014-12-29
2016-07-07
Philip Morris Products S.A.
Hydrophobic filter
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2968306A
(en)
*
1956-02-29
1961-01-17
Eastman Kodak Co
Tobacco smoke filter capable of selective removal of aldehydes
1974
1974-03-28
CH
CH430074A
patent/CH583529A5/xx
not_active
IP Right Cessation
1975
1975-03-18
NL
NL7503205A
patent/NL7503205A/en
not_active
Application Discontinuation
1975-03-21
DE
DE2559542A
patent/DE2559542C3/en
not_active
Expired
1975-03-21
DE
DE2512511A
patent/DE2512511C3/en
not_active
Expired
1975-03-21
SE
SE7503288A
patent/SE7503288L/sv
unknown
1975-03-25
BE
BE154731A
patent/BE827144A/en
unknown
1975-03-26
CA
CA223,119A
patent/CA1024032A/en
not_active
Expired
1975-03-26
LU
LU72140A
patent/LU72140A1/xx
unknown
1975-03-26
DK
DK129875A
patent/DK129875A/da
unknown
1975-03-26
US
US05/562,143
patent/US4015611A/en
not_active
Expired – Lifetime
1975-03-26
GB
GB39964/77A
patent/GB1500922A/en
not_active
Expired
1975-03-26
AU
AU79515/75A
patent/AU7951575A/en
not_active
Expired
1975-03-26
FR
FR7509411A
patent/FR2265291B1/fr
not_active
Expired
1975-03-26
ZA
ZA00751935A
patent/ZA751935B/en
unknown
1975-03-26
AT
AT230375A
patent/AT337062B/en
not_active
IP Right Cessation
1975-03-26
GB
GB12664/75A
patent/GB1500921A/en
not_active
Expired
1975-03-28
JP
JP50037726A
patent/JPS50132197A/ja
active
Pending
Also Published As
Publication number
Publication date
DE2512511A1
(en)
1975-10-02
SE7503288L
(en)
1975-09-29
AU7951575A
(en)
1976-09-30
DE2512511B2
(en)
1977-10-13
ZA751935B
(en)
1976-02-25
DE2559542B2
(en)
1978-09-07
ATA230375A
(en)
1976-09-15
DE2559542C3
(en)
1979-05-03
FR2265291A1
(en)
1975-10-24
LU72140A1
(en)
1977-02-01
DK129875A
(en)
1975-09-29
US4015611A
(en)
1977-04-05
CA1024032A
(en)
1978-01-10
FR2265291B1
(en)
1978-02-03
GB1500922A
(en)
1978-02-15
BE827144A
(en)
1975-09-25
AT337062B
(en)
1977-06-10
DE2512511C3
(en)
1978-06-01
DE2559542A1
(en)
1977-02-10
NL7503205A
(en)
1975-09-30
JPS50132197A
(en)
1975-10-20
CH583529A5
(en)
1977-01-14
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Legal Events
Date
Code
Title
Description
1978-06-28
PS
Patent sealed [section 19, patents act 1949]
1980-11-05
PCNP
Patent ceased through non-payment of renewal fee
