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. 09, 1979
Filed:
Jan. 18, 1977
Jean-Francois Grollier, Paris, FR;
Christian Monnais, Neuilly-sur-Seine, FR;
Chantal Fourcadier, Paris, FR;
L'Oreal, Paris, FR;
Abstract
A dye composition for keratinic fiber and particularly living human hair comprises an admixture of one or more diphenylamines whose corresponding indoamine has an oxidation-reduction potential between -450 and -350 mv and a polyhydroxybenzene having an oxidation-reduction potential between -600 and -300 mv and having the formula ##STR1## wherein R.sub.1 represents hydroxy or ##STR2## wherein R.sub.3 represents hydrogen or alkyl, and R.sub.2 represents hydrogen, or NH.sub.2 when R.sub.1 represents NH.sub.2, said diphenylamine and polyhydroxybenzene being present in an amount such that the ratio of the total number of moles of diphenylamine to the number of moles of polyhydroxybenzene is between 2 and 7.