Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2011-06-28
2011-06-28
Elhilo, Eisa B (Department: 1761)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S407000, C008S409000, C008S437000, C008S568000, C008S587000, C008S662000, C546S171000
Reexamination Certificate
active
07967872
ABSTRACT:
The present invention relates to thiol/disulphide azo quinolinium compounds for dyeing keratin fibres. The invention relates to a dye composition comprising a particular thiol/disulphide azo quinolinium chromophore-containing thiol or disulphide dye, and to a process for dyeing keratin fibres such as the hair, using said composition. It similarly relates to novel particular thiol/disulphide azo quinolinium chromophore-containing dyes and to the uses thereof in dyeing keratin fibres. The dyeing process according to the invention makes it possible to dye keratin fibres without damaging them, in a manner which is particularly persistent with respect to shampooing operations and common attacks. Moreover, the novel dyes according to the invention extend the colour range to violets and blues. This process also makes it possible to dye bleached keratin fibres in a strong and chromatic manner.
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Daubresse Nicolas
Greaves Andrew
Elhilo Eisa B
Finnegan Henderson Farabow Garrett & Dunner
L'Oreal S.A.
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