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:
May. 09, 1989
Filed:
Dec. 08, 1987
Applicant:
Inventors:
Assignee:
Henkel Kommanditgesellschaft Auf Aktien, Duesseldorf, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ; C07C / ;
U.S. Cl.
CPC ...
8408 ; 8407 ; 8424 ; 8429 ; 564274 ;
Abstract
Oxidation hair-dyeing preparations which contain as couplers N-(2-4dihydroxbenzylidene)-amino compounds corresponding to the following formula ##STR1## in which A is a group corresponding to one of the following formulae ##STR2## or salts thereof and the developers normally present in oxidation hair dyes. p-Phenylenediamine and derivatives thereof are particularly suitable as developers. Yellow to olive-brown colors of high fastness are obtained.