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:
Sep. 21, 1976
Filed:
Jun. 25, 1973
Applicant:
Inventors:
Assignee:
L'Oreal, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
8 10 ; 8 101 ; 8 102 ; 8 11 ; 8 25 ; 8 32 ; 8 79 ; 8 93 ;
Abstract
A dye for coloring hair is one of an indamine, indoaniline, indophenol, diaminobenzoquinone or mixtures thereof which is lyophilized from a solution of the dye in an organic solvent or in an aqueous solution of the organic solvent by freezing the solution at a temperature of -200.degree. to -60.degree.C, and then subliming the frozen solution under a vacuum at a temperature lower than the melting point of the frozen solution. The thus lyophilized dye can be desorped to eliminate, if necessary, residual moisture. The lyophilized dye can be solubilized in an aqueous solution to produce a hair dye composition and can be present therein in amounts of about 0.0005-4 percent by weight of said composition.