US4857071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel hair dye and method of use
Assignee: P&G Hair Care Holding Inc
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Filing: 1987-08-21
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Granted: 1989-08-15
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Expires: 2007-08-21
Abstract
Abstract The invention encompasses the use of nitroaminobenzaldehydes and nitroaminobenzylimines as hair dyeing agents.
Inventors
- 👤 James S. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:59
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/418; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; C; C07; C07C; C07C223/00; C07C223/06; C07C251/00; C07C251/02; C07C251/24
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
31 words
A method of dyeing hair comprising applying to said hair an amount sufficient to dye same of at least one compound selected from the group consisting of: 4-[(2-hydroxyethyl)-amino]-3-nitrobenzaldehyde, N-(2-hydroxyethyl)-4-[(2-hydroxyethyl)amino]-3-nitro-benzylimine, and N-ethyl-(4-ethylamino-3-nitro)benzylimine.
Claim 2
Independent Claim
31 words
A method of dyeing hair comprising applying to said hair an amount sufficient to dye same of at least one compound selected from the group consisting of: 4-[(2-hydroxyethyl)-amino]-3-nitrobenzaldehyde, N-(2-hydroxyethyl)-4-[(2-hydroxyethyl)amino]-3-nitro-benzylimine, and N-ethyl-(4-ethylamino-3-nitro)benzylimine.
Claim 3
Dependent Claim
11 words
The method according to claim 1, wherein said compound is 4-[(2-hydroxyethyl)amino]-3-nitrobenzaldehyde.
Claim 4
Dependent Claim
11 words
The method according to claim 1, wherein said compound is N-(2-hydroxyethyl)-4-[(2-hydroxyethyl)amino]-3-nitro-benzylimine.
Claim 5
Dependent Claim
11 words
The method according to claim 1, wherein said compound is N-ethyl-(4-ethylamino-3-nitro)benzylimine.
Claim 6
Dependent Claim
63 words
A hair dyeing composition containing (a) a hair dyeing effective amount of at least one compound selected from the group consisting of: 4-[2(hydroxyethyl)amino]-3-nitrobenzaldehyde, N-(2-hydroxyethyl)-4-[(2-hydroxyethyl)amino]-3-nitrobenzylimine, and N-ethyl-(4-ethylamino-3-nitro)-benzylimine; (b) a carrier, a surfactant; and (c) at least one ingredient selected from the group consisting of diluents, buffer agents and activators; wherein each of components (b) and (c) are present in cosmetically effective and acceptable amounts.
Claim 7
Dependent Claim
63 words
A hair dyeing composition containing (a) a hair dyeing effective amount of at least one compound selected from the group consisting of: 4-[2(hydroxyethyl)amino]-3-nitrobenzaldehyde, N-(2-hydroxyethyl)-4-[(2-hydroxyethyl)amino]-3-nitrobenzylimine, and N-ethyl-(4-ethylamino-3-nitro)-benzylimine; (b) a carrier, a surfactant; and (c) at least one ingredient selected from the group consisting of diluents, buffer agents and activators; wherein each of components (b) and (c) are present in cosmetically effective and acceptable amounts.
Claim 8
Dependent Claim
11 words
The composition according to claim 5, wherein said compound is 4-[(2-hydroxyethyl)amino]-3-nitrobenzaldehyde.
Claim 9
Dependent Claim
11 words
The composition according to claim 5, wherein said compound is N-(2-hydroxyethyl)-4-[(2-hydroxyethyl)amino]-3-nitrobenzylimine.
Claim 10
Dependent Claim
11 words
The composition according to claim 5, wherein said compound is N-ethyl-(4-ethylamino-3-nitro)benzylimine.
Claim 11
Dependent Claim
22 words
The composition according to claim 5, wherein said compound is present in an amount of from about 0.001 to about 2.0 wt%.
Claim 12
Dependent Claim
1 words
4-[(2-hydroxyethyl)amino]-3-nitrobenzaldehyde.
Claim 13
Dependent Claim
1 words
4-[(2-hydroxyethyl)amino]-3-nitrobenzaldehyde.
Claim 14
Dependent Claim
1 words
N-(2-hydroxyethyl)-4-[(2-hydroxyethyl)amino]-3-nitrobenzylimine.
Claim 15
Dependent Claim
1 words
N-(2-hydroxyethyl)-4-[(2-hydroxyethyl)amino]-3-nitrobenzylimine.
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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |