Dyeing composition for dyeing keratinous fibers comprising a...

Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing

Reexamination Certificate

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Details

C008S407000, C008S437000, C008S451000, C008S463000, C008S466000, C008S570000, C008S573000, C008S574000, C548S318100, C548S321100, C548S400000, C546S184000

Reexamination Certificate

active

06884266

ABSTRACT:
The invention concerns a novel dyeing composition for dyeing keratinous fibers, in particular human hair, comprising a cationic azo dye of formula (I): W1—N═N—W2—NW3W4, and the dyeing method using said composition and the novel compounds of formula (I).

REFERENCES:
patent: 5879412 (1999-03-01), Rondeau et al.
patent: 5919273 (1999-07-01), Rondeau et al.
patent: 0 850 636 (1998-07-01), None
patent: 0 852 135 (1998-07-01), None
patent: 2 378 069 (1978-08-01), None
English language Derwent Abstract of FR 2 378 069, Aug. 18, 1978.

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