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:
Oct. 02, 1990
Filed:
May. 31, 1988
Applicant:
Inventors:
Alex Junino, Livry-Gargan, FR;
Jean J Vandenbossche, Aulnay-sous-Bois, FR;
Herve Borowiak, Tremblay-les-Gonesse, FR;
Gerard Lang, Saint-Gratien, FR;
Assignee:
L'Oreal, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
8411 ; 8408 ; 8409 ; 8412 ; 8416 ; 8421 ; 8424 ; 564443 ;
Abstract
New meta-phenylenediamines, process for preparation thereof, intermediate compounds and use of these metaphenylenediamines as couplers for the oxidation dyeing of keratinous fibres and especially human hair. The invention relates to the compounds of the formula: ##STR1## in which R.sub.1 and R.sub.2 denote, independently of one another, a hydrogen atom, a C.sub.1 -C.sub.4 alkyl radical or a C.sub.2 -C.sub.3 mono- or polyhydroxyalkyl radical,