Patent US4196145A successfully refreshed from Google Patents.
US4196145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing keratin fibers with 2-substituted m-toluenediamines
Assignee: P&G Hair Care Holding Inc
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Filing: 1978-01-09
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Granted: 1980-04-01
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Expires: 1998-01-09
Abstract
Abstract Oxidation dye compositions particularly useful for dyeing human hair containing as the meta component compounds of the formula: ##STR1## or their non-toxic salts, wherein R is alkyl, hydroxyalkyl, phenylalkyl, phenylsulfonyls, alkylsulfonyls or cyanoalkyl.
Inventors
- 👤 Alexander Halasz
- 👤 David Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:50
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/411; A61Q; A61Q5/00; A61Q5/10; C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
9 words
The compound of formula: ##STR17## or its hydrochloride salts.
Claim 2
Dependent Claim
9 words
The compound of formula: ##STR17## or its hydrochloride salts.
Claim 3
Dependent Claim
9 words
The compound of formula: ##STR18## or its hydrochloride salts.
Claim 4
Dependent Claim
9 words
The compound of formula: ##STR18## or its hydrochloride salts.
References Cited (Backward Citations)
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Cited
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US2663732A
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US2750326A
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US3184387A
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Cited
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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) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |