US4031160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-Amino-4-hydroxy-5-chloro toluene and the hydrochloride thereof
Assignee: L'Oréal SA
•
Filing: 1975-06-30
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Granted: 1977-06-21
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Expires: 1995-06-30
Abstract
Abstract 2-Amino-4-hydroxy-5-chloro toluene and the hydrochloride thereof are couplers usefully employed in the production of a hair dye by reaction with an aromatic paradiamine.
Inventors
- 👤 Gregoire Kalopissis
- 👤 Andree Bugaut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:03
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/10; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/415
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
6 words
2-amino-4-hydroxy-5-chloro toluene and its hydrochloride salt.
Claim 2
Dependent Claim
6 words
2-amino-4-hydroxy-5-chloro toluene and its hydrochloride salt.
Claim 3
Dependent Claim
9 words
The compound of claim 1, which is 2-amino-4-hydroxy-5-chloro toluene.
References Cited (Backward Citations)
US3558259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |