Primary intermediates for oxidative coloration of hair

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

Reexamination Certificate

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C008S408000, C548S559000, C549S021000, C564S336000

Reexamination Certificate

active

06916346

ABSTRACT:
Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1):wherein R is selected from C1to C5alkyl or hydroxyalkyl, a C3to C6cyclic ring containing hetero atoms selected from O, S and N atoms, and —CH2—Ar where Ar is an aromatic ring wherein the aromatic ring may be substituted with one or two hydroxy C1to C3alkoxy, or amino groups.

REFERENCES:
patent: 6774244 (2004-08-01), Lim et al.
patent: 1095993 (1960-12-01), None
patent: 19604178 (1987-08-01), None

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