US4139610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent waving composition
Assignee: KH Neochem Co Ltd
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Filing: 1977-04-14
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Granted: 1979-02-13
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Expires: 1997-04-14
Abstract
Abstract Permanent waving composition containing as active ingredients cysteine and N-acetylcysteine. The composition contains preferably 3-15% cysteine and 0.2-3% N-acetylcysteine. It is possible to avoid the separation of crystals derived from the air-oxidation of cysteine by the composition of the present invention.
Inventors
- 👤 Yoshimasa Miyazaki
- 👤 Shigeru Matsumura
- 👤 Takayoshi Yamauchi
- 👤 Morio Harada
- 👤 Hisatoshi Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:45
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/447; A61K2800/00; A61K2800/40; A61K2800/59
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
25 words
A permanent waving composition comprising as active ingredients cysteine in an amount of about 3-15% and N-acetylcysteine in an amount of about 0.2-3 weight %.
Claim 2
Dependent Claim
25 words
A permanent waving composition comprising as active ingredients cysteine in an amount of about 3-15% and N-acetylcysteine in an amount of about 0.2-3 weight %.
Claim 3
Dependent Claim
18 words
A composition of claim 1, in which the amount of N-acetylcysteine is about 10% by weight of cysteine.
Claim 4
Dependent Claim
15 words
A composition of claim 1, in which the pH of the composition is about 7-10.
Claim 5
Dependent Claim
35 words
A permanent waving composition comprising as active ingredients cysteine in an amount of about 3-15 weight % and N-acetylcysteine in an amount of 0.3-3 weight % which is more than 10 weight % of cysteine.
Claim 6
Dependent Claim
35 words
A permanent waving composition comprising as active ingredients cysteine in an amount of about 3-15 weight % and N-acetylcysteine in an amount of 0.3-3 weight % which is more than 10 weight % of cysteine.
Claim 7
Dependent Claim
20 words
A composition of claim 4, in which the amount of cysteine and N-acetylcysteine in total is about 4-10 weight %.
Claim 8
Dependent Claim
39 words
A permanent waving composition comprising as active ingredients cysteine in an amount of about 3-15 weight % and N-acetylcysteine in an amount of about 0.2-3 weight %, wherein the amount of N-acetylcysteine is about 10% by weight of cysteine.
Claim 9
Dependent Claim
39 words
A permanent waving composition comprising as active ingredients cysteine in an amount of about 3-15 weight % and N-acetylcysteine in an amount of about 0.2-3 weight %, wherein the amount of N-acetylcysteine is about 10% by weight of cysteine.
Claim 10
Independent Claim
33 words
A method of imparting a wave to human hair which comprises contacting said hair with a composition comprising about 3 to 15 weight percent cysteine and about 0.2 to 3 weight percent N-acetylcysteine.
Claim 11
Independent Claim
33 words
A method of imparting a wave to human hair which comprises contacting said hair with a composition comprising about 3 to 15 weight percent cysteine and about 0.2 to 3 weight percent N-acetylcysteine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |