US3908672A
Expired / Lapsed
US
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Novel process for improving and modifying the properties of hair
Assignee: L'Oréal SA
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Filing: 1974-03-08
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Granted: 1975-09-30
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Expires: 1994-03-08
Abstract
Abstract Process for improving and modifying the properties of living human hair which comprises subjecting the hair to stretching by mechanical deformation, and converting from 10 to 50% of the cystine in the hair to lanthionine. The conversion is accomplished in an aqueous medium with an alkaline composition.
Inventors
- 👤 Pierre Bore
- 👤 Jean-Claude Arnaud
- 👤 Gregoire Kalopissis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:34
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/04; A61K; A61K8/00; A61K8/18; A61K8/19
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
83 words
A PROCESS FOR IMPROVING AND MODIFYING THE PROPERTIES OF LIVING HUMAN HAIR WHICH COMPRISES SUBJECTING THE HAIR TO A STRETCHING BY MECHANICAL DEFORMATION AND TREATING SAID HAIR IN AN AQUEOUS MEDIUM WITH A COMPOSITION CONSISTING ESENTIALLY OF AN ALKALI OR ALKALINE EARTH METAL HYDROXIDE BASE AND HAVING A PH BETWEEN ABOUT 10.5 AND 13 FOR A TIME SUFFICIENT TO CONVERT ABOUT 10 TO 50% OF THE CYSTINE OF THE HAIR INTO LANTHIONINE, WHILE MAINTAINING THE HAIR IN THE WET STATE DURING THE TREATMENT.
Claim 2
Dependent Claim
83 words
A PROCESS FOR IMPROVING AND MODIFYING THE PROPERTIES OF LIVING HUMAN HAIR WHICH COMPRISES SUBJECTING THE HAIR TO A STRETCHING BY MECHANICAL DEFORMATION AND TREATING SAID HAIR IN AN AQUEOUS MEDIUM WITH A COMPOSITION CONSISTING ESENTIALLY OF AN ALKALI OR ALKALINE EARTH METAL HYDROXIDE BASE AND HAVING A PH BETWEEN ABOUT 10.5 AND 13 FOR A TIME SUFFICIENT TO CONVERT ABOUT 10 TO 50% OF THE CYSTINE OF THE HAIR INTO LANTHIONINE, WHILE MAINTAINING THE HAIR IN THE WET STATE DURING THE TREATMENT.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein about 15 to 50% of the cystine is transformed into lanthionine.
Claim 4
Dependent Claim
45 words
The process of claim 1 wherein the hair to be treated has been previously degraded and has a relative degree of cystine less than the normal content by at least 10% and the process is applied so as to reduce correspondingly the degree of lanthionization.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein the hair is treated at a temperature between about 25* and 120*C for sufficient time to obtain the degree of lanthionine desired.
Claim 6
Dependent Claim
37 words
The process of claim 4 wherein said composition has a pH of between 12.5 and 13, and the process is carried out at a temperature between about 30* and 120*C for from about 5 to 60 minutes.
Claim 7
Dependent Claim
25 words
The process of claim 5 wherein the temperature is from about 30* to 50*C and the treatment time is between about 20 and 60 minutes.
Claim 8
Dependent Claim
23 words
The process of claim 5 wherein the temperature is between 50* and 80*C and the treatment time is between 10 and 50 minutes.
Claim 9
Dependent Claim
23 words
The process of claim 5 wherein the temperature is between 80* and 120*C, and the treatment time is between 5 and 20 minutes.
Claim 10
Dependent Claim
60 words
The process of claim 4 wherein said composition also contains a lanthionization activator selected from the group consisting of electrolytes that are neutral from an oxidation-reduction standpoint; reducing agents having a limited hydrolytic action on the S-S bonds of cystine; and cationic surfactant compounds; said treatment being carried out for about 5 to 60 minutes at a temperature between 30*-120*C.
Claim 11
Dependent Claim
23 words
The process of claim 9 wherein the temperature is between 30* and 50*C and the treatment time is between 15 and 60 minutes.
Claim 12
Dependent Claim
26 words
The process of claim 9 wherein the temperature is between 50* and 80*C and the treatment time is between 5 to 10 minutes and 40 minutes.
Claim 13
Dependent Claim
23 words
The process of claim 9 wherein the temperaturE is between 80* and 120*C, and the treatment time is between 5 and 20 minutes.
Claim 14
Dependent Claim
24 words
The process of claim 9 wherein the electrolytes are inorganic electrolytes and are present at a concentration of up to 5 moles per liter.
Claim 15
Dependent Claim
24 words
The process of claim 9 wherein the electrolytes are organic electrolytes and are present at a concentration of up to one mole per liter.
Claim 16
Dependent Claim
32 words
The process of claim 9 wherein the reducing agents are alkali or alkaline earth metal sulfides and are present at a concentration of up to 3 X 10 2 moles per liter.
Claim 17
Dependent Claim
28 words
The process of claim 4 wherein the temperature is between about 50* to 80*C, and 80 to 120*C and the hair is rolled up on heated hair curlers.
Claim 18
Dependent Claim
40 words
The process of claim 4 wherein the temperature is between 30* and 50*C and the hair is either rolled on hair curlers or on hair setting rollers, or is subjected to a mechanical smoothing with the aid of a comb.
Claim 19
Dependent Claim
31 words
The process of claim 4 wherein the hair is subjected to a stretching by mechanical deformation corresponding to a stretching of the order of 1 to 3% of the wet hair.
Claim 20
Dependent Claim
28 words
The process of claim 4 wherein the composition contains at least one hydroxide selected from the group consisting of calcium hydroxide, lithium hydroxide, sodium hydroxide, and potassium hydroxide.
Claim 21
Dependent Claim
23 words
The process of claim 4 in which the composition is in the form of a gel or a cream containing an oil-in-water emulsion.
Claim 22
Dependent Claim
29 words
The process of claim 9 wherein said reducing agent is an alkali or alkaline earth metal sulfite present in amounts between 10 3 and 10 1 moles per liter.
Claim 23
Dependent Claim
114 words
A process for improving and modifying the properties of living human hair which comprises subjecting the hair to a stretching by mechanical deformation and treating said hair in an aqueous medium with a composition having a pH of between 10.5 and 13, said composition consisting essentially of an alkali or alkaline earth metal hydroxide base and a lanthionization activator selected from the group consisting of cetyl trimethylammonium bromide present in amounts of up to 3 X 10 2 moles per liter and a quaternary ammonium hydroxide present in amounts up to 10 1 moles per liter, said treatment being carried out for about 5 to 60 minutes at a temperature between 30* and 120*C.
Claim 24
Dependent Claim
114 words
A process for improving and modifying the properties of living human hair which comprises subjecting the hair to a stretching by mechanical deformation and treating said hair in an aqueous medium with a composition having a pH of between 10.5 and 13, said composition consisting essentially of an alkali or alkaline earth metal hydroxide base and a lanthionization activator selected from the group consisting of cetyl trimethylammonium bromide present in amounts of up to 3 X 10 2 moles per liter and a quaternary ammonium hydroxide present in amounts up to 10 1 moles per liter, said treatment being carried out for about 5 to 60 minutes at a temperature between 30* and 120*C.
References Cited (Backward Citations)
US3154470A
Cited
US3347248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |