Compositions for dyeing keratinous fibers comprising...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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Reexamination Certificate

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06855827

ABSTRACT:
A composition for dyeing keratinous fibers, in particular human keratinous fibers, such as human hair, containing, in a medium suitable for dyeing:as oxidation base, at least one compound of formula (I) below:in which:R1is a hydrogen atom, an alkyl radical, an aryl radical, a heterocycle radical, or a halogen atom,R2is a hydrogen atom, an alkyl radical, a hydroxyalkyl radical, or an aminoalkyl radical,Za, Zband Zcare independently a nitrogen atom or a carbon carrying an R3or R4radical with meanings identical to those of R1; wherein at least one of Za, Zband Zcis a nitrogen atom; it being possible for R3and R4to form between themselves a substituted or unsubstituted aromatic ring.

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English Language Derwent Abstract of JP 4-133053.

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