Patent US3768490A successfully refreshed from Google Patents.
US3768490A
Expired / Lapsed
US
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Permanently having and permanently setting of hair
Assignee: L'Oréal SA
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Filing: 1972-01-31
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Granted: 1973-10-30
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Expires: 1992-01-31
Abstract
Abstract Process for permanently waving hair and permanently setting hair which inclides the steps of subjecting hair on rollers and applying a self neutralizing composition containing in mixture a thiol selected from the group consisting of: thioglycerol, thioglycolic acid, dimercapto-adipic acid, dimercapto-1,4 butanediol-2,3 and thiolactic acid, and a disulfide, aid disulfide being dithiodiglycerol, or dithiodiglycolic acid only when the thiol is thioglycolic acid, and wherein the amount of thiol is preferably about 2 - 5 percent weight of the composition and wherein the numerical ratio of the disulfide groups to thiol groups is greater than 1,5, or greater than 2 when the thiol is thioglycolic acid and the disulfide is dithiodiglycolic acid.
Inventors
- 👤 G Kalopissis
- 👤 P Roussopoulos
- 👤 C Zviak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:59
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46; A61K2800/00; A61K2800/40; A61K2800/59
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A process which produces a permanent deformation of the hair wherein: the hair is subjected to mechanical deformation and treated with a sufficient amount of a self-neutralizing composition containing in aqueous or hydroalcoholic solution, a mixture of: 2 to 5 percent of thioglycolic acid, and dithiodiglycolic acid, the numerical ratio of the disulfide groups to the thiol groups being greater than 2 and said composition having a pH of 8,5 and 10; the composition is left to react during a period of time contained between 5 and 30 minutes; mechanical deformation is relieved; and the hair is rinsed.
Claim 2
Dependent Claim
21 words
A process according to claim 2, wherein the hair is saturated with the composition before it is subjected to mechanical deformation.
Claim 3
Dependent Claim
21 words
A process according to claim 2, wherein the mechanical deformation is produced by rollers of 8 to 10 mm. in diameter.
Claim 4
Dependent Claim
24 words
A process according to claim 2, wherein mechanical deformation is produced by combing and the composition is applied in the form of a cream.
Claim 5
Dependent Claim
136 words
A process which produces permanent setting of the hair wherein: the hair is set on rollers of 15 to 20 mm. in diameter, and treated with a sufficient amount of a self-neutralizing composition containing, in aqueous or hydroalcoholic solution, a mixture of: a thiol having a concentration between 2 and 5 percent, said thiol being selected from the group consisting of: thioglycerol, thioglycolic acid, dimercapto-adipic acid, dimercapto-1,4 butanediol-2,3, and thiolactic acid, and a disulfide, said disulfide being dithiodiglycerol, the numerical ratio of the disulfide groups to the thiol groups being greater than 1,5, and said composition having a pH between 8,5 and 10; the composition is left to react during a period of time contained between 5 and 30 minutes; the hair, still on rollers, is rinsed; and the hair is dried by heat externally provided.
Claim 6
Dependent Claim
113 words
A process which produces permanent setting of the hair wherein: the hair is rolled on curlers of about 15 to 20 mm. in diameter, and treated with a sufficient amount of a self-neutralizing composition containing in aqueous or hydroalcoholic solution a mixture of: 2 to 5 percent of thioglycolic acid, and dithiodiglycolic acid with a numerical ratio of the disulfide groups to the thiol groups being greater than 2, and the said composition having a pH between 8,5 anD 10.; the composition is left to react during a period of time contained between 5 and 30 minutes; the hair, still on rollers, is rinsed; and the hair is dried by heat externally provided.
Claim 7
Dependent Claim
34 words
A process according to claim 7, wherein: the hair is rinsed after the standing period of 5 to 30 minutes; and the hair is saturated by an aqueous, or hydroalcoholic solution containing a resin.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |