GB1374989A

GB1374989A – Surface treating method
– Google Patents

GB1374989A – Surface treating method
– Google Patents
Surface treating method

Info

Publication number
GB1374989A

GB1374989A
GB1488371*[A
GB1488371A
GB1374989A
GB 1374989 A
GB1374989 A
GB 1374989A

GB 1488371 A
GB1488371 A
GB 1488371A
GB 1374989 A
GB1374989 A
GB 1374989A
Authority
GB
United Kingdom
Prior art keywords
agent
cationic
alkyl
agents
cationic form
Prior art date
1970-12-08
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
GB1488371*[A
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.)

Procter and Gamble Ltd

Original Assignee
Procter and Gamble 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.)
1970-12-08
Filing date
1971-12-08
Publication date
1974-11-20

1971-03-12
Priority to GB669971A
priority
Critical
patent/GB1370111A/en

1971-11-30
Priority to US00203415A
priority
patent/US3809646A/en

1971-12-06
Priority to DE19712160411
priority
patent/DE2160411A1/en

1971-12-07
Priority to FR7143907A
priority
patent/FR2117493A5/fr

1971-12-07
Priority to BE776343A
priority
patent/BE776343A/en

1971-12-07
Priority to CA129,534A
priority
patent/CA999596A/en

1971-12-07
Priority to NL7116806A
priority
patent/NL7116806A/xx

1971-12-07
Priority to AT1053271A
priority
patent/AT324514B/en

1971-12-08
Application filed by Procter and Gamble Ltd
filed
Critical
Procter and Gamble Ltd

1971-12-08
Priority to GB1488371*[A
priority
patent/GB1374989A/en

1971-12-08
Priority to GB5822570A
priority
patent/GB1344634A/en

1972-03-10
Priority to NL7203246A
priority
patent/NL7203246A/xx

1972-03-10
Priority to DE19722211577
priority
patent/DE2211577A1/en

1972-03-10
Priority to DE2211576A
priority
patent/DE2211576C3/en

1972-03-10
Priority to AT204372A
priority
patent/AT321906B/en

1972-03-10
Priority to AT204272A
priority
patent/AT323302B/en

1972-03-10
Priority to CH357472A
priority
patent/CH549685A/en

1972-03-10
Priority to BE780516A
priority
patent/BE780516A/en

1972-03-10
Priority to FR7208507A
priority
patent/FR2128852B1/fr

1972-03-10
Priority to BE780512A
priority
patent/BE780512A/en

1972-03-10
Priority to CA136,804A
priority
patent/CA970781A/en

1972-03-10
Priority to NLAANVRAGE7203245,A
priority
patent/NL168281C/en

1972-03-10
Priority to SE7203106A
priority
patent/SE378817B/xx

1972-03-10
Priority to FR7208508A
priority
patent/FR2129614A5/fr

1973-05-18
Priority to US00361740A
priority
patent/US3856684A/en

1974-11-20
Publication of GB1374989A
publication
Critical
patent/GB1374989A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

C—CHEMISTRY; METALLURGY

C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES

C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent

C11D1/88—Ampholytes; Electroneutral compounds

C—CHEMISTRY; METALLURGY

C07—ORGANIC CHEMISTRY

C07D—HETEROCYCLIC COMPOUNDS

C07D235/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings

C07D235/02—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems

C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles

C07D235/06—Benzimidazoles; Hydrogenated benzimidazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached in position 2

C07D235/14—Radicals substituted by nitrogen atoms

C—CHEMISTRY; METALLURGY

C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES

C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent

C11D1/38—Cationic compounds

C11D1/62—Quaternary ammonium compounds

C—CHEMISTRY; METALLURGY

C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES

C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00

C11D3/0005—Other compounding ingredients characterised by their effect

C11D3/001—Softening compositions

D—TEXTILES; PAPER

D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR

D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS

D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment

D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen

D06M13/325—Amines

D06M13/335—Amines having an amino group bound to a carbon atom of a six-membered aromatic ring

D—TEXTILES; PAPER

D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR

D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS

D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment

D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen

D06M13/46—Compounds containing quaternary nitrogen atoms

D—TEXTILES; PAPER

D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR

D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS

D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment

D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen

D06M13/46—Compounds containing quaternary nitrogen atoms

D06M13/47—Compounds containing quaternary nitrogen atoms derived from heterocyclic compounds

D—TEXTILES; PAPER

D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR

D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS

D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment

D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen

D06M13/46—Compounds containing quaternary nitrogen atoms

D06M13/47—Compounds containing quaternary nitrogen atoms derived from heterocyclic compounds

D06M13/473—Compounds containing quaternary nitrogen atoms derived from heterocyclic compounds having five-membered heterocyclic rings

D—TEXTILES; PAPER

D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR

D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS

D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic

G—PHYSICS

G08—SIGNALLING

G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

G08B13/00—Burglar, theft or intruder alarms

G08B13/02—Mechanical actuation

G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires

Abstract

1374989 Treating surfaces with convertible surfactants PROCTER & GAMBLE Ltd 8 Dec 1971 [8 Dec 1970 12 March 1971 14 May 1971] 57019/71 57020/71 and 14883/71 Divided out of 1344634 and 1370111 Heading D1P [Also in Divisions A5 and C5] A method of treating a surface which has a negative charge when washed comprises (a) wetting the surface with an aqueous solution containing a convertible surface active agent which is able to exist in cationic and non- cationic (i.e. nonionic, anionic or zwitterionic) forms and which has a pKa (defined as being the pH at which 50 mole per cent of the agent is present in cationic form) of 4-9, the solution having a pH below or not more than 2 units above the pKa value of the agent; and (b) subsequently washing the surface with a wash liquor having a pH at least 2 units above the pKa value of the agent. In its cationic form, the agent is substantive to the surface. In its non-cationic form it is non substantive to the surface thus facilitating its removal during step (b). The surface may be a textile (e.g. cotton) and the agent may confer softening, antistatic, soil repellant, soil release, dye transfer resistance and bactericidal properties. The agent may have the formula I: where R1 is in general a long chain alkyl or alkyl aryl group (up to 26C), R3 is a short chain alkyl or aryl group (up to 6C), optionally substituted by hydroxy, or cyano, and R2 may be the same as R1 or R3. X is an anion e.g. halogen or methosulphate and n may be 1-4. Q is an optionally substituted homo- or hetero-cyclic ring having a weakly acidic character. Q may be a phenolic, imidazole or benzimidazole ring. Substituents for Q may be halogen, alkyl or alkoxy (1-6C), nitro, amino, amido, keto, hydroxy or cyano. Other suitable agents include polyoxyalkylene amines, nitrogen ylides as disclosed in Specification 1003926 and 1360233 and quaternary ammonio imides as disclosed in Specification 1359673. Typical compounds are cetylamide trimethylammonium iodide, octadecyl dimethyl-4-hydroxyphenylammonium chloride or iodide, 2-benzimidazolo methyl hexadecyldimethylammonium chloride and 2-benzimidazolo methyl octadecyldimethyl ammonium chloride. The agent may be formulated as a rinse additive composition containing pH buffering agents (e.g. water soluble phosphates, borates, carbonates; citrates or tartrates and their corresponding acids) in such an amount as to generate an aqueous solution having the pH required by step (a) on dilution with tap water or by addition to a rinse solution. Alternatively the agent may be formulated as an alkaline detergent composition containing the usual building salts (e.g. alkali metal phosphates, polyphosphates, carbonates or silicates), chelating agents (e.g. nitriloacetates polycarboxylates, citrates or gluconates), neutral salts (e.g. alkali metal chlorides or sulphates), bleaching agents (e.g. sodium perborate, percarbonates or perphosphates) and non-cationic surface active agents. Suitable non-cationics include anionics when compatible, e.g. alkylaryl sulphonates, alkyl sulphates, and alkyl ether sulphates; nonionics e.g. polyoxyethylene alcohols, alkylphenols, fatty acids and amines, polyethylene oxide-polypropylene oxide condensates and polyoxyethylene sorbitan esters; zwitterionics e.g. quaternary ammonium carboxylates, and sulphonates; and semi-polar nonionic surfactants e.g. tertiary amine oxides and phosphine oxides. The agent, when in cationic form, improves the substantivity of the nonionics and zwitterionics. The agent may be present in an amount of 0.01-5% on the dry weight of the textile. The solution in step (b) for washing the agent off the surface preferably has a pH at least 3 units above the pKa value of the agent, and may be tap water (pH 6.5).

GB1488371*[A
1970-12-08
1971-12-08
Surface treating method

Expired

GB1374989A
(en)

Priority Applications (24)

Application Number
Priority Date
Filing Date
Title

GB669971A

GB1370111A
(en)

1970-12-08
1971-03-12
Quaternary ammonium benzimidazole derivatives as their use as textile treatment agents

US00203415A

US3809646A
(en)

1970-12-08
1971-11-30
Novel ammoniophenolate compounds

DE19712160411

DE2160411A1
(en)

1970-12-08
1971-12-06

Surface-active compounds

FR7143907A

FR2117493A5
(en)

1970-12-08
1971-12-07

BE776343A

BE776343A
(en)

1970-12-08
1971-12-07

TENSIO-ACTIVE COMPOUNDS

CA129,534A

CA999596A
(en)

1970-12-08
1971-12-07
Surface active and textile softening compounds

NL7116806A

NL7116806A
(en)

1970-12-08
1971-12-07

AT1053271A

AT324514B
(en)

1970-12-08
1971-12-07

TEXTILE SOFTENING MIX

GB1488371*[A

GB1374989A
(en)

1970-12-08
1971-12-08
Surface treating method

GB5822570A

GB1344634A
(en)

1970-12-08
1971-12-08
Surface active and textile softening compounds

FR7208507A

FR2128852B1
(en)

1970-12-08
1972-03-10

NL7203246A

NL7203246A
(en)

1970-12-08
1972-03-10

DE2211576A

DE2211576C3
(en)

1970-12-08
1972-03-10

Use of quaternary benzimidazoles as fabric softeners with a simultaneous dirt-releasing effect

AT204372A

AT321906B
(en)

1970-12-08
1972-03-10

PROCESS FOR PRODUCING NEW IMIDAZOLE DERIVATIVES

AT204272A

AT323302B
(en)

1970-12-08
1972-03-10

TEXTILE TREATMENT PRODUCTS

CH357472A

CH549685A
(en)

1970-12-08
1972-03-10

COMMERCIAL TEXTILE TREATMENT AGENT.

BE780516A

BE780516A
(en)

1970-12-08
1972-03-10

NEW SURFACTANTS

DE19722211577

DE2211577A1
(en)

1970-12-08
1972-03-10

New surface-active compounds

BE780512A

BE780512A
(en)

1970-12-08
1972-03-10

TEXTILE TREATMENT AGENTS

CA136,804A

CA970781A
(en)

1970-12-08
1972-03-10
Surface active compounds and compositions

NLAANVRAGE7203245,A

NL168281C
(en)

1970-12-08
1972-03-10

METHOD FOR PREPARING A TEXTILE SOFTENING PREPARATION BASED ON AN IMIDA SOLE DERIVATIVE

SE7203106A

SE378817B
(en)

1970-12-08
1972-03-10

FR7208508A

FR2129614A5
(en)

1970-12-08
1972-03-10

US00361740A

US3856684A
(en)

1970-12-08
1973-05-18
Composition containing benzimidazole derivatives for softening rinse

Applications Claiming Priority (7)

Application Number
Priority Date
Filing Date
Title

GB5822570

1970-12-08

GB669971A

GB1370111A
(en)

1970-12-08
1971-03-12
Quaternary ammonium benzimidazole derivatives as their use as textile treatment agents

GB5702071

1971-12-08

GB1488371*[A

GB1374989A
(en)

1970-12-08
1971-12-08
Surface treating method

GB5701971

1971-12-08

US23003272A

1972-02-28
1972-02-28

US00361740A

US3856684A
(en)

1970-12-08
1973-05-18
Composition containing benzimidazole derivatives for softening rinse

Publications (1)

Publication Number
Publication Date

GB1374989A
true

GB1374989A
(en)

1974-11-20

Family
ID=27562556
Family Applications (3)

Application Number
Title
Priority Date
Filing Date

GB669971A
Expired

GB1370111A
(en)

1970-12-08
1971-03-12
Quaternary ammonium benzimidazole derivatives as their use as textile treatment agents

GB1488371*[A
Expired

GB1374989A
(en)

1970-12-08
1971-12-08
Surface treating method

GB5822570A
Expired

GB1344634A
(en)

1970-12-08
1971-12-08
Surface active and textile softening compounds

Family Applications Before (1)

Application Number
Title
Priority Date
Filing Date

GB669971A
Expired

GB1370111A
(en)

1970-12-08
1971-03-12
Quaternary ammonium benzimidazole derivatives as their use as textile treatment agents

Family Applications After (1)

Application Number
Title
Priority Date
Filing Date

GB5822570A
Expired

GB1344634A
(en)

1970-12-08
1971-12-08
Surface active and textile softening compounds

Country Status (10)

Country
Link

US
(2)

US3809646A
(en)

AT
(3)

AT324514B
(en)

BE
(3)

BE776343A
(en)

CA
(2)

CA999596A
(en)

CH
(1)

CH549685A
(en)

DE
(3)

DE2160411A1
(en)

FR
(3)

FR2117493A5
(en)

GB
(3)

GB1370111A
(en)

NL
(3)

NL7116806A
(en)

SE
(1)

SE378817B
(en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3951879A
(en)

*

1973-12-14
1976-04-20
Colgate-Palmolive Company
Detergent that reduces electrostatic cling of synthetic fabrics

US3997453A
(en)

*

1974-02-11
1976-12-14
Colgate-Palmolive Company
Softener dispersion

US3984335A
(en)

*

1975-01-16
1976-10-05
Basf Wyandotte Corporation
Compositions for souring and softening laundered textile materials and stock solutions prepared therefrom

US4306081A
(en)

*

1980-01-18
1981-12-15
Albee Laboratories, Inc.
Symmetrical quaternary ammonium compounds and their use in heavy metals recovery

US4335219A
(en)

*

1981-04-06
1982-06-15
The Dow Chemical Company
Process for reacting isocyanates in the presence of quaternary ammonium zwitterions

US4485048A
(en)

*

1982-08-09
1984-11-27
Akzona Incorporated
Ethoxylated quaternary benzyl compounds

US4687509A
(en)

*

1986-05-19
1987-08-18
The Dow Chemical Company
N,N,N-tributyl-(3-hydroxybenzyl)ammonium salts and a method for increasing yield of soybeans

US5234817A
(en)

*

1988-10-07
1993-08-10
Eastman Kodak Company
Wash solution containing a cationic surfactant and its use in chlamydial and gonococcal determinations

EP0736594A1
(en)

*

1995-04-03
1996-10-09
The Procter & Gamble Company
Soaker compositions

US6087313A
(en)

*

1997-02-27
2000-07-11
The Procter & Gamble Company
Soaker compositions

EP1699912A1
(en)

*

2003-12-03
2006-09-13
The Procter and Gamble Company
Automatic machine laundering of fabrics

US7371718B2
(en)

*

2005-04-22
2008-05-13
The Dial Corporation
Liquid fabric softener

US9826876B2
(en)

2013-09-30
2017-11-28
Kimberly-Clark Worldwide, Inc.
Low-moisture cloud-making cleaning article

CN103951702B
(en)

*

2014-05-09
2016-05-18
齐齐哈尔大学
1,1 ‘-dialkyl group-3, the preparation method of salt compound in 3 ‘-(2-phosphate-1,3-propylidene) imidazoles

Family Cites Families (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

DE1287585B
(en)

*

1963-12-13
1969-01-23
Hoechst Ag

Process for the preparation of benzimidazolium compounds

CH443777A
(en)

*

1965-08-06
1968-02-15
Agripat Sa

Process for protecting textile keratin fibers from insect caused damage and means for carrying out this process

US3673209A
(en)

*

1965-08-06
1972-06-27
Geigy Chem Corp
Biocidally active benzimidazole compounds

1971

1971-03-12
GB
GB669971A
patent/GB1370111A/en
not_active
Expired

1971-11-30
US
US00203415A
patent/US3809646A/en
not_active
Expired – Lifetime

1971-12-06
DE
DE19712160411
patent/DE2160411A1/en
active
Pending

1971-12-07
CA
CA129,534A
patent/CA999596A/en
not_active
Expired

1971-12-07
FR
FR7143907A
patent/FR2117493A5/fr
not_active
Expired

1971-12-07
NL
NL7116806A
patent/NL7116806A/xx
unknown

1971-12-07
BE
BE776343A
patent/BE776343A/en
unknown

1971-12-07
AT
AT1053271A
patent/AT324514B/en
not_active
IP Right Cessation

1971-12-08
GB
GB1488371*[A
patent/GB1374989A/en
not_active
Expired

1971-12-08
GB
GB5822570A
patent/GB1344634A/en
not_active
Expired

1972

1972-03-10
DE
DE2211576A
patent/DE2211576C3/en
not_active
Expired

1972-03-10
DE
DE19722211577
patent/DE2211577A1/en
active
Pending

1972-03-10
CA
CA136,804A
patent/CA970781A/en
not_active
Expired

1972-03-10
AT
AT204372A
patent/AT321906B/en
not_active
IP Right Cessation

1972-03-10
BE
BE780516A
patent/BE780516A/en
unknown

1972-03-10
SE
SE7203106A
patent/SE378817B/xx
unknown

1972-03-10
FR
FR7208507A
patent/FR2128852B1/fr
not_active
Expired

1972-03-10
BE
BE780512A
patent/BE780512A/en
not_active
IP Right Cessation

1972-03-10
AT
AT204272A
patent/AT323302B/en
not_active
IP Right Cessation

1972-03-10
NL
NLAANVRAGE7203245,A
patent/NL168281C/en
not_active
IP Right Cessation

1972-03-10
FR
FR7208508A
patent/FR2129614A5/fr
not_active
Expired

1972-03-10
NL
NL7203246A
patent/NL7203246A/xx
not_active
Application Discontinuation

1972-03-10
CH
CH357472A
patent/CH549685A/en
not_active
IP Right Cessation

1973

1973-05-18
US
US00361740A
patent/US3856684A/en
not_active
Expired – Lifetime

Also Published As

Publication number
Publication date

FR2128852A1
(en)

1972-10-20

CA970781A
(en)

1975-07-08

US3856684A
(en)

1974-12-24

BE780516A
(en)

1972-09-11

AT323302B
(en)

1975-07-10

FR2129614A5
(en)

1972-10-27

DE2211577A1
(en)

1972-09-21

GB1344634A
(en)

1974-01-23

NL168281C
(en)

1981-10-16

NL7116806A
(en)

1972-06-12

NL7203246A
(en)

1972-09-14

DE2211576A1
(en)

1972-09-21

BE776343A
(en)

1972-06-07

NL7203245A
(en)

1972-09-14

SE378817B
(en)

1975-09-15

AT321906B
(en)

1975-04-25

NL168281B
(en)

1981-10-16

DE2211576C3
(en)

1982-01-28

CH549685A
(en)

1974-05-31

BE780512A
(en)

1972-09-11

FR2128852B1
(en)

1976-08-06

DE2160411A1
(en)

1972-06-22

DE2211576B2
(en)

1981-04-30

US3809646A
(en)

1974-05-07

FR2117493A5
(en)

1972-07-21

CA999596A
(en)

1976-11-09

AT324514B
(en)

1975-09-10

GB1370111A
(en)

1974-10-09

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Legal Events

Date
Code
Title
Description

1975-04-03
PS
Patent sealed [section 19, patents act 1949]

1985-09-04
PCNP
Patent ceased through non-payment of renewal fee

Free format text:
IN PAT.BUL.5032,PAGE 1916 FOR 1374948 READ 1374989

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