US4263213A
Expired / Lapsed
US
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2,4-Dihydroxy-4'-(substituted amino)-diphenylamines
Assignee: L'Oréal SA
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Filing: 1979-04-04
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Granted: 1981-04-21
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Expires: 1999-04-04
Abstract
Abstract New compounds suitable for dyeing keratin fibres, especially human hair, are described. The compounds have the formula: <IMAGE> (I) or an acid addition salt thereof, in which formula either R1 and R2 form, together with the nitrogen atom to which they are bonded, a morpholino or piperidino ring and R represents a hydrogen atom, or R1 represents a hydrogen atom, R2 represents a furfuryl or methoxyethyl radical and R represents a hydrogen atom or a methyl radical.
Inventors
- 👤 Andree Bugaut
- 👤 Francoise Estradier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:24
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/135; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/413; A61Q; A61Q5/00; A61Q5/10; C07D307/00; C07D307/02; C07D307/04; C07D307/10; C07D307/14; C07D307/34; C07D307/38; C07D307/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
39 words
A 2,4-dihydroxydiphenylamine of the formula: ##STR13## or an acid addition salt thereof, in which formula R 1 represents a hydrogen atom, R 2 represents a tetrahydrofurfuryl or methoxyethyl radical and R represents a hydrogen atom or a methyl radical.
Claim 2
Dependent Claim
39 words
A 2,4-dihydroxydiphenylamine of the formula: ##STR13## or an acid addition salt thereof, in which formula R 1 represents a hydrogen atom, R 2 represents a tetrahydrofurfuryl or methoxyethyl radical and R represents a hydrogen atom or a methyl radical.
Claim 3
Dependent Claim
10 words
A dihydroxydiphenylamine according to claim 1 which is 2,4-dihydroxy-4'-N-(β-methoxyethylamino)-diphenylamine dihydrochloride.
Claim 4
Dependent Claim
10 words
A dihydroxydiphenylamine according to claim 1 which is 2,4-dihydroxy-5-methyl-4'-N-(β-methoxyethylamino)-diphenylamine dihydrochloride.
Claim 5
Dependent Claim
11 words
A dihydroxy diphenylamine according to claim 1 which is 2,4-dihydroxy-4'-tetrahydrofurfurylaminodiphenylamine dihydrochloride.
Claim 6
Dependent Claim
11 words
A dihydroxy diphenylamine according to claim 1 which is 2,4-dihydroxy-5-methyl-4'-tetrahydrofurfurylamino diphenylamine.
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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |