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:
Jun. 19, 2001
Filed:
Jul. 02, 1999
Applicant:
Inventors:
Atsushi Nakashimada, Tokyo, JP;
Nozomi Nagashima, Tokyo, JP;
Masahiko Sakai, Tokyo, JP;
Hajime Miyabe, Tokyo, JP;
Yutaka Shibata, Tokyo, JP;
Assignee:
Kao Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K 7/06 ; A61K 7/13 ;
U.S. Cl.
CPC ...
A61K 7/06 ; A61K 7/13 ;
Abstract
The invention relates to a hair dye composition comprising (A) an acid dye and (B) an alkylene carbonate having 3-5 carbon atoms in total, said composition exhibiting a pH of 2-6, and having a buffer capacity of 0.007-0.5 gram equivalent/L, and to a method of dyeing hair using the hair dye composition. The hair dye composition is excellent in hair-dyeing ability without coloring the scalp and skin and has good fastness to shampoo and the like.