GB1572224A – Aerosol hair lacquer composition
– Google Patents
GB1572224A – Aerosol hair lacquer composition
– Google Patents
Aerosol hair lacquer composition
Download PDF
Info
Publication number
GB1572224A
GB1572224A
GB4508777A
GB4508777A
GB1572224A
GB 1572224 A
GB1572224 A
GB 1572224A
GB 4508777 A
GB4508777 A
GB 4508777A
GB 4508777 A
GB4508777 A
GB 4508777A
GB 1572224 A
GB1572224 A
GB 1572224A
Authority
GB
United Kingdom
Prior art keywords
composition
amount
container according
weight
mixture
Prior art date
1976-10-29
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
GB4508777A
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.)
LOreal SA
Original Assignee
LOreal SA
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.)
1976-10-29
Filing date
1977-10-28
Publication date
1980-07-30
1977-10-28
Application filed by LOreal SA
filed
Critical
LOreal SA
1980-07-30
Publication of GB1572224A
publication
Critical
patent/GB1572224A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
A—HUMAN NECESSITIES
A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
A61K8/00—Cosmetics or similar toiletry preparations
A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
A61K8/8147—Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers
A—HUMAN NECESSITIES
A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
A61K8/00—Cosmetics or similar toiletry preparations
A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
A61K8/04—Dispersions; Emulsions
A61K8/046—Aerosols; Foams
A—HUMAN NECESSITIES
A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
A61K8/00—Cosmetics or similar toiletry preparations
A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
A61K8/8164—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers, e.g. poly (methyl vinyl ether-co-maleic anhydride)
A—HUMAN NECESSITIES
A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
A61K8/00—Cosmetics or similar toiletry preparations
A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
A61K8/817—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)
A61K8/8176—Homopolymers of N-vinyl-pyrrolidones. Compositions of derivatives of such polymers
A—HUMAN NECESSITIES
A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
A61Q5/00—Preparations for care of the hair
A61Q5/06—Preparations for styling the hair, e.g. by temporary shaping or colouring
Description
(54) AEROSOL HAIR LACQUER COMPOSITION
(71) We, L’OREAL, a French Body Corporate of 14, rue Royale – 75008, Paris, France, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
The present invention relates to an aerosol hair lacquer composition, namely a pressurized sprayable aerosol hair lacquer composition.
Heretofore numerous propellants have been proposed for use in the production of aerosol hair lacquers, amongst which are principally halogenated hydrocarbons and mixtures thereof. Representative such halo enated hydrocarbons which have been used include the “Freons” (Registered Trade Mark , especially Freons 11, 12, 22 and 114. It has also been proposed to use mixtures of these materials and particularly the following mixtures: Freons 11/12, Freons 11/12/114, Freons 11/12/22, Freons 12/114, Freons 22/114 and Freons 12/22/114. It has also previously been proposed to use, as the aerosol propellant, either carbon dioxide gas or nitrous oxide but without other propellants such as halogenated hydrocarbons.
During the past few years, it has also been proposed to utilize as an aerosol propellant a mixture of certain halogenated hydrocarbons with carbon dioxide gas or nitrous oxide. The most widely employed of these are mixtures of Freon 11/12 with nitrous oxide or carbon dioxide gas or a mixture of Freon 12 with carbon dioxide gas or nitrous oxide. Although very widely used, these various aerosol propellants have not always provided complete satisfaction.
It has now been found, according to this invention, that is is possible to obtain excellent aerosol hair lacquer compositions when there is used as the aerosol propellant a mixture of “Freon 22” (monochlorodifluoromethane) and/or Freon 142b (monochlorodifluoroethane) with carbon dioxide gas or nitrous oxide. Although broadly this aerosol propellant could be categorized as a mixture of at least one “Freon” with carbon dioxide gas or nitrous oxide, the particular combination of “Freon 22” or “Freon 142b” or mixture thereof, with carbon dioxide gas or nitrous oxide has not, to our knowledge, ever been envisaged for use as an aerosol propellant in an aerosol hair lacquer composition.
This particular mixture provides excellent qualities; in particular it assures very good compatibility with a large number of cosmetic resins currently employed in the production of aerosol hair lacquer compositions. Moreover, with this propellant mixture, it is possible to obtain very fine sprays which provide excellent covering power of the hair. It is also important to note that the combination of “Freon 22” and/or “Freon 142b” with carbon dioxide gas or nitrous oxide provides significant ecologic advantages.
According to the present invention there is provided an aerosol container containing a hair lacquer composition (which must, of course, be suitable for application to hair) which composition comprises: i)at least one synthetic film-forming cosmetic resin (or polymer) capable of controlling the hair, for example by maintaining it in a desired configuration;
(ii) at least one principal solvent which is ethanol or isopropanol;
(iii) at least one auxiliary solvent in an amount from 0 to 40% by weight of said composition;
(iv) water in an amount from 0 to 20% by weight of said composition; and
(v) a propellant consisting of a mixture of (1) a monochlorodifluoromethane, mono chlorodifluroethane or a mixture thereof, in an amount of 15 to 40, preferably 20 to 35% by weight of said composition and (2) carbon dioxide gas or nitrous oxide or a mixture thereof, in an amount such as to provide in the aerosol container a total pressure of from 5 to 8 bars, preferably about 6 bars.
According to the present invention, the synthetic polymer or resin is generally present in the composition in an amount from 0.5 to 10% by weight thereof.
Representative synthetic polymers or resins which can be used in the hair lacquer composition of the present invention include:
(a) polyvinylpyrrolidone, for example that known under the name of “PVP K30” (M.W.
= 40,000) sold by GAF;
(b) copolymers of vinylpyrrolidone and vinyl acetate and especially those (i) known under the commercial names of “PVP/VA E 335, S 630 and E 535” sold by GAF, viz. E 335 – 30% vinylpyrrolidone/70% vinyl acetate, S 630 – 60% vinylpyrrolidone/40% vinyl acetate and
E535 – 50 %vinylpyrrolidone/ 50% vinyl acetate; and (ii) known under the Registered Trade
Marks “Luviskol VA 37E, VA64 and VA28I”, sold by BASF, viz VA37E – 30% vinylpyr rolidone/70%vinyl acetate, VA64 – 60%vinylpyrrolidone/40%vinyl acetate and VA28I 20% vinylpyrrolidone/80% vinyl acetate;
(c) copolymers of vinyl acetate and crotonic acid, especially those sold under the commercial names of (i) “Resine 28-13-10” by National Starch, (ii) “Aresil 86.12” by Montanoir and (iii “Aristoflex C” by Hoechst; ) copolymers of methyl vinyl ether and maleic anhydride half-esterified with a lower aliphatic alcohol such as methanol, ethanol, butanol or isopropanol, and particularly copolymers known under the Registered Trade Marks “Gantrex ES225, ES335I and ES425” sold by GAF, viz. “ES-225” – monoethyl ester of methyl vinyl ether/maleic acid copolymer having viscosity of 3.7 cps, “ES-335I” – monoisopropyl ester of methyl vinyl ether/maleic acid copolymer and “ES425” – monobutyl ester of methyl vinyl ether/maleic acid copolymer having a viscosity of 5.1 cps;
(e) amphoteric acrylic copolymers, especially those sold under the commercial name of “Amphomer” by National Starch;
(f) vinylic terpolymers with carboxylic and acrylic ester groups, especially those sold by
Barr under the commercial names of “VEM 640 and 649”;
(g) terpolymers of vinyl acetate, crotonic acid and vinyl neodecanoate, especially those sold by National Starch under the commercial name of “Resine 28.2930”; or
(h) those polymers described in the following French Patents Nos. 1,580,545; 1,584,053; and 75.09892.
Those copolymers carrying free carboxylic acid functions are generally employed in a form wherein they are neutralized to an extent of 10 to 100%with an organic base such as 2-amino -2-methyl -1,3-propanediol, 2-amino -2-methyl -1-propanol or triisopropanolamine.
It will be appreciated that while these polymers or resins have quite varied structures, nonetheless, they can all be employed in the compositions of the present invention without provoking any significant or appreciable incompatibility with the propellant mixture, which incompatibility is generally manifested by a clogging of the aerosol release valve of the container.
In accordance with the invention, the principal solvent is generally present in the hair lacquer composition in an amount from 5 to 79.5%by weight and, preferably, from 10 to 69.5% by weight.
The monochlorodifluoromethane, “Freon 22”, which is used in the propellant mixture, has the chemical formula: CHC1F2; its molecular weight is about 86.475; it is a liquefied gas under pressure; it is non-flammable, non-corrosive and non-toxic; and its boiling point is -30.8 C/760mm Hg.
“Freon 142b” has the chemical formula: CH3-CC1F2; its molecular weight is about 100.5; it is a liquefied gas under pressure; it is only very slightly flammable; it is non-corrosive and non-toxic; and its boiling point is -9.8 C/760 mm Hg.
According to a preferred embodiment of the present invention, the aerosol hair lacquer composition includes at least one auxiliary organic solvent such as methylene chloride, trichloroethane, ethyl chloride, acetone, ethyl acetate or dichlorodinuoroethane, present in a maximum concentration of 40% by weight and preferably in an amount of 10 to 35% by weight of said composition.
The aerosol hair lacquer composition may also contain water in an amount which does not exceed 20% by weight, preferably from 0.5 to 6% by weight.
When the hair lacquer composition of the present invention contains water in an amount of 0.5 to 6%, it is also preferable to avoid the use of a chlorinated auxiliary solvent or at least to use this material in as small amounts as possible.
The aerosol hair lacquer composition of the present invention can also contain other conventional cosmetic adjuvants such as plasticizers, neutralizing agents, brightening agents, perfumes and hair dyes.
The following Examples further illustrate the present invention. Unless otherwise specified, all parts and percentages are by weight.
EXAMPLE I
A pressurized sprayable aerosol hair lacquer composition is prepared by admixing the following components and packaging the resulting mixture, under pressure, in an aerosol container:
“Resine 28-13-10” by
National starch ……………………………………………… 2.90 g 2-amino-2-methyl- 1- propanol 0.26 g
Perfume 0.04 g
Ethanol 61.80 g
“Freon 22” ………………………………………………….35.00 g
Carbon dioxide gas, sufficient for a pressure of 6 bars within the container.
EXAMPLE II
A pressurized sprayable aerosol hair lacquer composition is prepared by admixing the following components and packaging the resulting mixture, under pressure, in an aerosol container:
Gantrez ES-225, sold GAF …………………………………… 5.70 g Triisopropanolamine – 0.48 g Methylene chloride ……………………………………………20.00 g
“Solulan 16” (lanolin
alcohols ethoxylated with
16 moles of ethylene oxide
per mole of alcohol) ………………………………………… 0.15 g
“Freon 22” ………………………………………………….30.00 g
Ethanol 43.67 g
Carbon dioxide gas, sufficient for a pressure of 6 bars within the container.
EXAMPLE Ill A pressurized sprayable aerosol hair lacquer composition is prepared by admixing the following components and packaging the resulting mixture, under pressure, in an aerosol container:
PVP K 30, sold by GAF ……………………………………….. 4.00 g
Ethanol 76.00 g
“Freon 22” …………………………………………………..20.00 g
Nitrous oxide, sufficient for a pressure of 6 bars within the container.
EXAMPLE W A pressurized sprayable aerosol hair lacquer composition is prepared by admixing the following components and packaging the resulting mixture, under pressure, in an aerosol container:
Gantrez ES-225, sold by GAF …………………………………… 2.90 g
Triisopropanolamine 0.24 g
Perfume 0.03 g
“Isopropylan 33” (transesteri
fication product of lanolin
with isopropanol) …………………………………………….. 0.2 g
Ethanol 61.63 g
“Freon 142b” 35 g
Carbon dioxide gas, sufficient for a pressure of 6 bars -within the container.
EXAMPLE V
A pressurized sprayable aerosol hair lacquer composition is prepared by admixing the following components and packaging the resulting mixture, under pressure, in an aerosol container:
“Amphomer” sold by
National Starch 1.5 g 2-amino-2-methyl- 1- propanol 0.27 g
“Solulan 5” (lanolin alcohols
ethoxylated with 5 moles of
ethylene oxide) ……………………………………………… 0.15 g
Perfume 0.03 g
Methylene chloride ……………………………………………35 g
“Freon 142b” 30 g
Ethanol 33.05 g
Nitrous oxide, sufficient for a pressure of 6 bars within the container.
EXAMPLE VI
A pressurized sprayable aerosol hair lacquer composition is prepared by admixing the following components and packaging the resulting mixture, under pressure, in an aerosol container:
“Resine 28-13-10” sold by
National Starch 4 g 2-amino2-methyl- 1- propanol 0.35 g
Silicone oil ………………………………………………….. 0.4 g
Perfume 0.06 g
Ethanol ……………………………………………………..75.19 g
“Freon 142b” 20 g
Carbon dioxide gas, sufficient for a pressure of 6 bars within the container.
EXAMPLE VII
A pressurized sprayable aerosol hair lacquer composition is prepared by admixing the following components and packaging the resulting mixture, under pressure, in an aerosol container:
“Resine 28-13-10” sold by
National Starch 4 g
2-amino-2-methyl-1
propanol 0.35 g
Silicone oil ………………………………………………….. 0.4 g
Perfume 0.06 g
Ethanol 75.19 g
“Freon 22” …………………………………………………..10 g
“Freon 142b” 10 g
Carbon dioxide gas, sufficient for a pressure of 6 bars within the container.
Claims (13)
WHAT WE CLAIM IS:
1. An aerosol container containing a hair lacquer composition, which composition compnses
(i) at least one synthetic film-forming cosmetic polymer capable of controlling the hair;
(ii) at least one principal solvent which is ethanol or isopropanol;
(iii) at least one auxiliary solvent in an amount from 0 to 40 % by weight of said composition;
(iv) water in an amount from 0 to 20% by weight of said composition; and
(v) a propellant which is a mixture of (1) monochlorodifluoromethane, monochiorodif- luoroethane or a mixture thereof, in an amount from 15 to 40%byweight of said composition and (2) carbon dioxide or nitrous oxide or a mixture thereof, in an amount such as to provide in the container a total pressure of 5 to 8 bars.
2. A container according to claim 1 wherein component (i) is present in an amount from 0.5 to 10% by weight of said composition.
3. A container according to claim 1 or 2 wherein component (ii) is present in an amount from 5 to 79.5% by weight of said composition.
4. A container according to claim 3 wherein component (ii) is present in an amount from 10 to 69.5% by weight of said composition.
5. A container according to any one of claims 1 to 4, wherein component (ifi) is present in an amount from 10 to 35% by weight of said composition.
6. A container according to any one of claims 1 to 5, wherein said auxiliary solvent is methylene chloride, trichloroethane, ethyl chloride, acetone, ethyl acetate or dichlorodifluoroethane.
7. A container according to any one of claims 1 to 6, wherein the composition contains water in an amount from 0.5 to 6% by weight of said composition.
8. A container according to any one of claims 1 to 7, wherein the internal pressure is about 6 bars.
9. A container according to any one of the preceding claims wherein the propellant (1) is present in an amount from 20 to 35% by weight of the composition.
10. A container according to any one of the preceding claims, wherein the composition contains at least one of a plasticizer, brightening agent, perfume, or hair dye.
11. A container according to claim 1 substantially as hereinbefore described.
12. A container according to claim 1 substantially as described in any one of Examples I to VII.
13. An aerosol propellant which comprises a mixture of (1) monochlorodifluoromethane, monochlorodifluoroethene or a mixture thereof and (2) carbon dioxide or nitrous oxide or a mixture thereof.
GB4508777A
1976-10-29
1977-10-28
Aerosol hair lacquer composition
Expired
GB1572224A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR7632842A
FR2368947A1
(en)
1976-10-29
1976-10-29
NEW LACQUERS TO FIX THE HAIR IN THE FORM OF AEROSOLS
Publications (1)
Publication Number
Publication Date
GB1572224A
true
GB1572224A
(en)
1980-07-30
Family
ID=9179413
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4508777A
Expired
GB1572224A
(en)
1976-10-29
1977-10-28
Aerosol hair lacquer composition
Country Status (3)
Country
Link
DE
(1)
DE2748475A1
(en)
FR
(1)
FR2368947A1
(en)
GB
(1)
GB1572224A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2327882A
(en)
*
1997-08-06
1999-02-10
Reckitt & Colman Inc
Aerosol compositions for controlling dust mites and the allergens produced by them
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2486394A1
(en)
*
1979-11-28
1982-01-15
Oreal
COMPOSITION FOR THE TREATMENT OF KERATIN FIBERS BASED ON AMPHOTERIC POLYMERS AND ANIONIC POLYMERS
DE3044754C2
(en)
1979-11-28
1995-06-01
Oreal
Agents and processes for the treatment of keratin fibers
DE19934701C1
(en)
*
1999-07-23
2001-05-03
Wella Ag
Hydrous aerosol hair spray with a reduced content of volatile organic compounds
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3144391A
(en)
*
1960-03-28
1964-08-11
Gillette Co
Hair-setting composition
1976
1976-10-29
FR
FR7632842A
patent/FR2368947A1/en
active
Granted
1977
1977-10-28
DE
DE19772748475
patent/DE2748475A1/en
not_active
Withdrawn
1977-10-28
GB
GB4508777A
patent/GB1572224A/en
not_active
Expired
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2327882A
(en)
*
1997-08-06
1999-02-10
Reckitt & Colman Inc
Aerosol compositions for controlling dust mites and the allergens produced by them
GB2327881A
(en)
*
1997-08-06
1999-02-10
Reckitt & Colman Inc
Control of dust particles
US6117440A
(en)
*
1997-08-06
2000-09-12
Reckitt Benckiser Inc.
Compositions effective for controlling dust mites and the allergens produced by dust mites
US6428801B1
(en)
1997-08-06
2002-08-06
Reckitt Benckiser Inc.
Methods for controlling dust mites and the allergens produced by dust mites
Also Published As
Publication number
Publication date
DE2748475A1
(en)
1978-05-03
FR2368947B1
(en)
1979-07-27
FR2368947A1
(en)
1978-05-26
Similar Documents
Publication
Publication Date
Title
EP1504744B1
(en)
2010-07-14
Aerosol cosmetic composition
EP0445714B1
(en)
1995-02-08
Alginate hair setting compositions
EP0418676A1
(en)
1991-03-27
Water-based two-phase aerosol hairsprays
ES2226951T3
(en)
2005-04-01
HAIR MOLDING COMPOSITIONS OF THE HAIR.
US5374420A
(en)
1994-12-20
Hair setting compositions
AU1276600A
(en)
2000-06-13
Hairstyling composition comprising a polymer with particular characteristics and a non-ionic polymer
US4397836A
(en)
1983-08-09
Aerosol hair lacquer composition containing as a propellant a mixture of trifluoromonochloroethane and carbon dioxide and or nitrous oxide
US4164562A
(en)
1979-08-14
Aerosol hair spray containing an ethyl or butyl monoester of a copolymer of maleic acid and a vinyl monomer
US4961921A
(en)
1990-10-09
Non-aerosol pump spray compositions
JP4331772B2
(en)
2009-09-16
Aerosol cosmetics
US5223247A
(en)
1993-06-29
Hair spra composition containing water soluble alkylated PVP copolymers as hair fixative therein
US3922341A
(en)
1975-11-25
Aerosol hair sprays containing ethyl or butyl monoester of copolymer of vinyl monomer and maleic acid
EP3082734B1
(en)
2021-03-10
Hair fixatives including cellulose ether based polyglucose polymers
US4261972A
(en)
1981-04-14
Hydroalcoholic aerosol hair sprays
GB1572224A
(en)
1980-07-30
Aerosol hair lacquer composition
US4954336A
(en)
1990-09-04
Non-aerosol pump hair spray compositions
JPH10139634A
(en)
1998-05-26
Hair-treating agent for dressing hair
US5326555A
(en)
1994-07-05
Clear hair spray composition capable of forming low tack films which dry rapidly
JP2724220B2
(en)
1998-03-09
Foam composition
JP2506555B2
(en)
1996-06-12
Aerosol hair spray based on N-carboxybutyl chitosan
WO1992007546A1
(en)
1992-05-14
Hair care compositions including setting shampoo and mousse compositions
EP1523300B1
(en)
2007-10-03
Hair care method characterised by application of specific 2-hydroxyalkanoic acids
GB1582617A
(en)
1981-01-14
Hair lacquer sprays having reduced inflammability
JPH0753325A
(en)
1995-02-28
Foamy aerosol cosmetic
GB2326889A
(en)
1999-01-06
Hair styling composition
Legal Events
Date
Code
Title
Description
1980-10-15
PS
Patent sealed
1993-06-23
PCNP
Patent ceased through non-payment of renewal fee
Effective date:
19921028