Patent US4662892A successfully refreshed from Google Patents.
US4662892A
Expired / Lapsed
US
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Hair dye composition
Assignee: CPPD Inc A CORP OF
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Filing: 1984-03-21
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Granted: 1987-05-05
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Expires: 2004-03-21
Abstract
Abstract A composition for use in the dyeing of keratinous fibres, particularly human hair, in order to produce a true dark black color, comprises an aqueous, substantially oxygen-free solution of the dye-precursors 2-methoxy-p-phenylenediamine and 2,4-diaminophenol, the composition having a pH value of from 6 to 12. The molar concentration of one dye precursor to the other is preferably from 1:10 to 10:1, and together they form from 0.25 to 15% by weight of the composition. Optionally, the composition can also contain a detergent and/or a thickening agent.
Inventors
- 👤 Barry G. Pike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:11
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/411; A61K8/415; A61Q; A61Q5/00; A61Q5/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
67 words
A composition for the dyeing of keratinous fibers to produce a true dark black color, which comprises as the sole dye precursors from 0.25 to 15% by weight of a mixture of 2-methoxy-p-phenylenediamine and 2,4-diaminophenol as an aqueous, substantially oxygen-free solution, the molar ratio of one dye precursor to the other being from 1:10 to 10:1, the composition having a pH value of from 6 tp 12.
Claim 2
Dependent Claim
67 words
A composition for the dyeing of keratinous fibers to produce a true dark black color, which comprises as the sole dye precursors from 0.25 to 15% by weight of a mixture of 2-methoxy-p-phenylenediamine and 2,4-diaminophenol as an aqueous, substantially oxygen-free solution, the molar ratio of one dye precursor to the other being from 1:10 to 10:1, the composition having a pH value of from 6 tp 12.
Claim 3
Dependent Claim
17 words
The composition of claim 1, wherein the dye precursors together form from 1 to 10% by weight.
Claim 4
Dependent Claim
18 words
The composition of claim 1, wherein the molar ratio of 2-methoxy-p-phenylenediamine to 2,4-diaminophenol is from 1:5 to 1:3.
Claim 5
Dependent Claim
18 words
The composition of claim 3, wherein the molar ratio of 2-methoxy-p-phenylenediamine to 2,4-diaminophenol is from 3:1 to 1:1.
Claim 6
Dependent Claim
20 words
The composition of claim 1, wherein the dye precursors each form from 0.1 to 14.9% by weight of the composition.
Claim 7
Dependent Claim
20 words
The composition of claim 5, wherein the dye precursors each form from 0.5 to 10% by weight of the composition.
Claim 8
Dependent Claim
42 words
The composition of claim 1, wherein the solution is maintained in an oxygen-free condition by the presence of from 0.01 to 2% by weight of an antioxidant selected from the group consisting of ascorbic acid, sodium metabisulphite, sodium dithionite and mixtures thereof.
Claim 9
Dependent Claim
17 words
The composition of claim 1, which additionally comprises from 1 to 15% by weight of a detergent.
Claim 10
Dependent Claim
31 words
The composition of claim 8, wherein the detergent is an anionic detergent selected from the group consisting of sodium lauryl ether sulphate (2EO), sodium lauryl ether sulphate (3EO), and mixtures thereof.
Claim 11
Dependent Claim
27 words
The composition of claim 8, wherein the detergent is a nonionic detergent selected from the group consisting of polyoxyethylene lauryl alcohol (23EO), oleic diethanolamide and mixtures thereof.
Claim 12
Dependent Claim
32 words
The composition of claim 1, which additionally comprises from 0.1 to 2% by weight of a thickening agent selected from the group consisting of carboxyvinyl polymers, polyethylene glycol distearate and mixtures thereof.
Claim 13
Dependent Claim
12 words
A closed container, dispenser or applicator containing the composition of claim 1.
Claim 14
Dependent Claim
16 words
The dispenser of claim 12 which is an aerosol pressurized pack dispenser containing an inert propellant.
Claim 15
Dependent Claim
32 words
A method of dyeing keratinous fibres a true dark black color, which comprises the step of applying to the keratinous fibres in the absence of hydrogen peroxide, the composition of claim 1.
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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |