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:
Dec. 12, 1989
Filed:
Oct. 31, 1988
L'Oreal, Paris, FR;
Abstract
The present invention relates to a composition for dyeing keratinic fibres, and human hair in particular, comprising the azo dye of formula: ##STR1## optionally in combination with at least one nitro benzene dye or with at least one aminoanthraquinone dye or with at least one nitro benzene and at least one aminoanthraquinone dye. The azo dye of formula (II) is nonmutagenic, has good solubility properties in the usual dye carriers, and imparts to hair hues which are stable, particularly to washing. The invention also relates to a process for dyeing human hair by direct coloration which comprises applying the dyeing composition defined above onto the hair, leaving it on the hair for 3 to 60 minutes and then rinsing and drying the hair.