US4459284A
Expired / Lapsed
US
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Permanent waving composition comprising amino acids
Assignee: Nikko Pharmaceutical Co Ltd
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Filing: 1981-06-09
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Granted: 1984-07-10
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Expires: 2001-06-09
Abstract
Abstract Permanent waving composition containing thioglycolic acid or a salt thereof, and an acidic and/or neutral amino acid.
Inventors
- 👤 Tanehiko Azuma
- 👤 Kiyofumi Wakui
- 👤 Nakatomi Fukuda
- 👤 Yukio Sugihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:34
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/46
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
An aqueous composition for permanently waving hair, which comprises 3 to 6 w/v % of ammonium thioglycolate, and an amino acid component selected from the group consisting of aspartic acid, threonine and a mixture of aspartic acid and threonine wherein the molar ratio of the aspartic acid to the threonine in said mixture is 1:3 to 3:1, the amount of the amino acid component being 0.3 to 1.5 moles per mole of the ammonium thioglycolate, the pH of the composition being 9.0-9.5.
Claim 2
Dependent Claim
82 words
An aqueous composition for permanently waving hair, which comprises 3 to 6 w/v % of ammonium thioglycolate, and an amino acid component selected from the group consisting of aspartic acid, threonine and a mixture of aspartic acid and threonine wherein the molar ratio of the aspartic acid to the threonine in said mixture is 1:3 to 3:1, the amount of the amino acid component being 0.3 to 1.5 moles per mole of the ammonium thioglycolate, the pH of the composition being 9.0-9.5.
Claim 3
Dependent Claim
20 words
A composition as claimed in claim 1 wherein said amino acid component is said mixture of aspartic acid and threonine.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |