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:
Apr. 03, 2007
Filed:
Nov. 26, 2004
Applicants:
Dominic Pratt, Darmstadt, DE;
Masayoshi Nojiri, Tokyo, JP;
Toshio Kawagishi, Minamiashigara, JP;
Inventors:
Assignees:
Kao Corporation, Tokyo, JP;
Fuji Photo Film Co., Ltd., Minamiashigara, JP;
Primary Examiner:
Int. Cl.
CPC ...
A61K 7/13 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method to achieve a reversible change of the colour of hair dyed with an azo dye wherein the change of the colour can be effected by, for example, the salonist or the consumer in a simple manner. The colour of the hair thus dyed may be changed simply by treating the dyed hair with an acid treatment composition at any time after the first dyeing treatment. If desired by the consumer, the colour may be returned to substantially the original post dye colour by treating the hair further with an alkaline treatment composition.