Patent US6206935B1 successfully refreshed from Google Patents.
US6206935B1
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Hair dyeing method
Assignee: Kao Corp
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Filing: 2000-02-24
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Granted: 2001-03-27
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Expires: 2020-02-24
Abstract
Abstract Described in the present invention is a hair dyeing method comprising treating the hair with a hair bleaching agent and then, without rinsing off the bleaching agent, with a direct hair dye. The present invention makes it possible to color the hair into a vivid color in a short time.
Inventors
- 👤 Satoshi Onitsuka
- 👤 Kazuhiro Okada
- 👤 Hajime Miyabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:07
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/08; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/34; A61K8/49; A61K8/4973; A61Q5/06; A61Q5/065; A61K2800/00; A61K2800/80; A61K2800/88; A61K2800/884; Y; Y10; Y10S; Y10S8/00; Y10S8/93
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A hair dyeing method, which comprises treating the hair with a hair bleaching agent and then, without washing away said bleaching agent, treating the hair with a direct hair dye, wherein the direct hair dye contains an acid dye (A), and propylene carbonate (B) and/or at least one organic solvent (C) selected from the group consisting of benzyloxyethanol, benzyl alcohol, phenoxyethanol, phenoxyisopropanol, benzyl glycerol, N-benzylformamide, cinnamyl alcohol, phenetyl alcohol, panisyl alcohol, p-methylbenzyl alcohol, methyl carbitol, ethyl carbitol and propyl carbitol, and has a pH of 2 to 6.
Claim 2
Dependent Claim
88 words
A hair dyeing method, which comprises treating the hair with a hair bleaching agent and then, without washing away said bleaching agent, treating the hair with a direct hair dye, wherein the direct hair dye contains an acid dye (A), and propylene carbonate (B) and/or at least one organic solvent (C) selected from the group consisting of benzyloxyethanol, benzyl alcohol, phenoxyethanol, phenoxyisopropanol, benzyl glycerol, N-benzylformamide, cinnamyl alcohol, phenetyl alcohol, panisyl alcohol, p-methylbenzyl alcohol, methyl carbitol, ethyl carbitol and propyl carbitol, and has a pH of 2 to 6.
Claim 3
Dependent Claim
24 words
A method according to claim 1 , which further comprises heating the hair after treatment with the hair bleaching agent and/or direct hair dye.
Claim 4
Dependent Claim
16 words
A method according to claim 1 , wherein the direct hair dye contains said propylene carbonate.
Claim 5
Dependent Claim
17 words
A method according to claim 1 , wherein the direct hair dye contains the organic solvent (C).
Claim 6
Dependent Claim
16 words
A method according to claim 4 , wherein the organic solvent contains benzyloxyethanol or benzyl alcohol.
Claim 7
Dependent Claim
21 words
A method according to claim 4 , wherein the direct hair dye contains 0.01 to 10% of the organic solvent (C).
Claim 8
Dependent Claim
19 words
A method according to claim 1 , wherein the direct hair dye has a pH of 2 to 5.
Claim 9
Dependent Claim
19 words
A method according to claim 1 , wherein the direct hair dye has a pH of 2.5 to 4.
Claim 10
Dependent Claim
85 words
A method according to claim 1 , wherein the direct hair additionally contains at least one component (D) selected from the group consisting of arabic gum, carrageenan, karaya gum, tragacanth gum, carob gum, quince seed, casein, dextrin, gelatin, sodium pectate, sodium alginate, methyl cellulose, ethyl cellulose, carboxymethyl cellulose (CMC), hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl alcohol (PVA), polyvinyl methyl ether (PVM), polyvinyl pyrrolidone (PVP), sodium polyacrylate, locust bean gum, guar gum, tamarind gum, dialkyldimethylammonium sulfate cellulose, xanthan gum, modified xanthan gum, magnesium aluminum silicate and bentonite.
Claim 11
Dependent Claim
19 words
The method of claim 9 , wherein the component (D) is hydroxyethyl cellulose, xanthan gum or modified xanthan gum.
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) | 2004-03-26 | 2004-09-25 | 2005-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-26 | 2008-09-25 | 2009-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-26 | 2012-09-25 | 2013-03-27 | $7700.00 | Window Closed / Lapsed |