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Patent US3666812A successfully refreshed from Google Patents.
US3666812A
Expired / Lapsed
US
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Diamino phenol hair dyeing compounds
Assignee: L'Oréal SA
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Filing: 1967-06-12
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Granted: 1972-05-30
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Expires: 1987-06-12
Abstract
Abstract Compounds suitable for use in one step hair and keratin fiber dyeing compositions which do not require the use of separate dye modifiers and are exceptionally color stable, having the formula IN WHICH R is selected from the group consisting of hydrogen and alkyll R1 is selected from the group consisting of alkyl, alkoxy, and dialkylamino, R4 which can be in position 5 or 6 on the ring is selected from the group consisting of hydrogen, halogen, hydroxy, alkyl, alkoxy and NH2, and at least one of said R1 and R4 is said dialkylamino or said NH2.
Inventors
- 👤 Gregoire Kalopissis
- 👤 Andree Bugaut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:44
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/415; A61Q; A61Q5/00; A61Q5/10; D; D06; D06P; D06P1/00; D06P1/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
The compound formula of claim 1, wherein said compound is 6 amino-4-methoxy-2-aminophenol.
Claim 2
Dependent Claim
11 words
The compound formula of claim 1, wherein said compound is 5-amino-4-methoxy-2-aminophenol.
Claim 3
Dependent Claim
7 words
The compound of claim 1, wherein 6-amino-4-dimethylamino-2-aminophenol.
Claim 4
Dependent Claim
7 words
The compound of claim 1, wherein 6-amino-4-diethylamino-2-aminophenol.
Claim 5
Dependent Claim
7 words
The compound of claim 1, wherein 4-diethylamino-2-aminophenol.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |