The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2012
Filed:
Dec. 09, 2008
Madeleine Leduc, Paris, FR;
Stéphane Sabelle, Paris, FR;
Eric Metais, St. Leu la Forêt, FR;
Christophe Rondot, Mitry-Mory, FR;
Madeleine Leduc, Paris, FR;
Stéphane Sabelle, Paris, FR;
Eric Metais, St. Leu la Forêt, FR;
Christophe Rondot, Mitry-Mory, FR;
L'Oreal S.A., Paris, FR;
Abstract
The invention relates to the dyeing of keratin fibers using azomethine direct dyes or reduced precursors of azomethine direct dyes of formula (I) and (II) obtained from 2-amino-3-hydroxypyridine. The invention relates to a dye composition comprising at least one azomethine direct dye or a reduced precursor of an azomethine direct dye, to a process for dyeing keratin fibers, using the said composition, and to their uses in the dyeing of keratin fibers. This composition allows a particularly stable and fast coloration to be obtained.