Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2005-05-17
2005-05-17
Gupta, Yogendra N. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S406000, C008S407000, C008S451000, C008S463000, C008S466000, C008S570000, C008S573000, C008S574000, C548S318100, C548S321100, C548S400000, C546S184000, C544S224000
Reexamination Certificate
active
06893471
ABSTRACT:
The invention concerns a dyeing composition for dyeing keratinous fibers, in particular human keratinous fibers and more particularly hair, comprising a dicationic diazo dye of formula W1—N═N—W2—N═N—W3as well as the dyeing method using same and the novel compounds of formula (I).
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Elhilo Eisa
Finnegan Henderson Farabow Garrett & Dunner LLP
Gupta Yogendra N.
L'Oreal S.A.
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