Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2008-06-19
2011-10-11
Elhilo, Eisa (Department: 1761)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S407000, C008S409000, C008S423000, C008S437000, C008S466000, C008S573000, C548S356100
Reexamination Certificate
active
08034124
ABSTRACT:
The subject of the present invention is azo derivatives containing a pyrazolinone unit having the following formula (I), their mesomeric forms, their addition salts with an acid and their solvates and their use for dyeing keratin fibers. The subject of the invention is also a composition for dying keratin fibers comprising at least one azo derivative containing a pyrazolinone unit of formula (I) as direct dye, and the method for dyeing keratin fibers using this composition. The present invention makes it possible in particular to obtain chromatic colors that are resistant to the various attacks to which the hair may be subjected, in particular to shampoos and to light.
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patent: WO 2006/024858 (2006-03-01), None
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STIC Search Report dated Nov. 9, 2010.
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International Search Report for PCT/EP2008/057819, dated Aug. 13, 2008.
Fadli Aziz
Metais Eric
Elhilo Eisa
Finnegan Henderson Farabow Garrett & Dunner LLP
L'Oreal S.A.
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