Patent US4259261A successfully refreshed from Google Patents.
US4259261A
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US
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Metaphenylenediamines
Assignee: L'Oréal SA
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Filing: 1979-03-21
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Granted: 1981-03-31
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Expires: 1999-03-21
Abstract
Abstract Couplers having the general formula (I): <IMAGE> or the acid salts thereof in which formula R is either (a) hydrogen or (b) a C1-C3 alkyl or (c) a C1-C3 hydroxyalkyl, and Z is either (a) hydroxyalkyl, or (b) alkoxyalkyl in which the alkoxy group contains 1 to 2 carbon atoms, or (c) mesylaminoalkyl, or (d) acetylaminoalkyl, or (e) ureidoalkyl, or (f) carbethoxyaminoalkyl the alkyl groups in the radicals constituting Z comprising from 2 to 3 carbon atoms and Z is not hydroxyethyl when R is hydrogen. These couplers form dyeing compositions when mixed with an oxidation base consisting of a paraphenylenediamine having the general formula: <IMAGE>
Inventors
- 👤 Andree Bugaut
- 👤 Jean-Jacques Vandenbossche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:38
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/411; A61K8/42; A61K8/46; A61K8/466; A61Q; A61Q5/00; A61Q5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
Compounds having the formula: ##STR14## or the acid salts thereof in which formula R is hydrogen and Z is mesylaminoethyl.
Claim 2
Dependent Claim
20 words
Compounds having the formula: ##STR14## or the acid salts thereof in which formula R is hydrogen and Z is mesylaminoethyl.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |