US4575378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted 4-amino-3-nitrophenols, processes for their preparation and hair-coloring agents containing these compounds
Assignee: Hans Schwarzkopf and Henkel GmbH
•
Filing: 1984-01-19
•
Granted: 1986-03-11
•
Expires: 2004-01-19
Abstract
Abstract The invention relates to new 3-nitro-4-aminophenols of the formula (I) ##STR1## in which R denotes hydrogen or halogen, preferably chlorine or bromine, and R' denotes hydrogen or alkyl, hydroxyalkyl, dihydroxyalkyl or halogenohydroxyalkyl which has 1 to 6 carbon atoms and is straight-chain or branched, with the proviso that, if R is hydrogen, R' does not denote hydrogen, methyl or β-hydroxyethyl. Processes for their preparation: (a) by reacting corresponding 3-nitro-4-aminophenols with certain halogenoalkyl chloroformates and subsequent basic treatment of the process products, or (b) by reacting corresponding 4-halogeno-3-nitrophenols with certain amines, and the intermediate products obtained and coloring agents for keratinic fibres, preferably for human hair, which contain at least one compound of the formula (I).
Inventors
- 👤 Winfried Seidel
- 👤 Thomas Oelschlager
- 👤 Wolfgang Schlenther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:25
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/418; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; A61Q5/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
20 words
Compound of the formula ##STR15## wherein R is Cl and R' is β-hydroxyethyl, α-methyl-β-hydroxyethyl, α-ethyl-β-hydroxyethyl, β-hydroxypropyl, γ-hydroxypropyl, β-hydroxy-n-butyl, or β-hydroxy-n-hexyl.
Claim 2
Dependent Claim
20 words
Compound of the formula ##STR15## wherein R is Cl and R' is β-hydroxyethyl, α-methyl-β-hydroxyethyl, α-ethyl-β-hydroxyethyl, β-hydroxypropyl, γ-hydroxypropyl, β-hydroxy-n-butyl, or β-hydroxy-n-hexyl.
Claim 3
Dependent Claim
8 words
Compound according to claim 1 which is 6-chloro-4-(β-hydroxyethyl)amino-3-nitrophenol.
Claim 4
Dependent Claim
8 words
Compound according to claim 1 which is 6-chloro-4-(γ-hydroxy-n-propyl)amino-3-nitrophenol.
Claim 5
Dependent Claim
39 words
Aqueous coloring agent for hair or keratinic fibers, wherein said coloring agent contains at least one compound of formula (I) as a dyestuff ##STR16## wherein R is Cl and R' is β-hydroxyethyl, α-methyl-β-hydroxyethyl, α-ethyl-β-hydroxyethyl, β-hydroxypropyl, γ-hydroxypropyl, β-hydroxy-n-butyl, or β-hydroxy-n-hexyl.
Claim 6
Dependent Claim
39 words
Aqueous coloring agent for hair or keratinic fibers, wherein said coloring agent contains at least one compound of formula (I) as a dyestuff ##STR16## wherein R is Cl and R' is β-hydroxyethyl, α-methyl-β-hydroxyethyl, α-ethyl-β-hydroxyethyl, β-hydroxypropyl, γ-hydroxypropyl, β-hydroxy-n-butyl, or β-hydroxy-n-hexyl.
Claim 7
Dependent Claim
8 words
Agent according to claim 4 which is 6-chloro-4-(β-hydroxyethyl)amino-3-nitrophenol.
Claim 8
Dependent Claim
8 words
Agent according to claim 4 which is 6-chloro-4-(γ-hydroxy-n-propyl)amino-3-nitrophenol.
Claim 9
Dependent Claim
54 words
A method of dyeing hair or keratinic fibers comprising contacting the hair or keratinic fibers with an effective coloring amount of the aqueous coloring agent of claim 4 for a time and at a temperature sufficient to color the hair or fibers, and rinsing the coloring agent from the hair or fibers with water.
Claim 10
Dependent Claim
54 words
A method of dyeing hair or keratinic fibers comprising contacting the hair or keratinic fibers with an effective coloring amount of the aqueous coloring agent of claim 5 for a time and at a temperature sufficient to color the hair or fibers, and rinsing the coloring agent from the hair or fibers with water.
Claim 11
Dependent Claim
54 words
A method of dyeing hair or keratinic fibers comprising contacting the hair or keratinic fibers with an effective coloring amount of the aqueous coloring agent of claim 6 for a time and at a temperature sufficient to color the hair or fibers, and rinsing the coloring agent from the hair or fibers with water.
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) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |