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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.:

US 6248314 B1

PDFFull Text
Date of Patent:
Jun. 19, 2001

Filed:

Jul. 02, 1999

Hair dye composition having a particular buffer capacity and containing an alkylene carbonate

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;

Attorney:

Oblon, Spivak, McClelland, Maier & Neustadt, P.C.

Primary Examiner:

Thurman K Page

Assistant Examiner:

Brian K Seidleck

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.

Find Patent Forward Citations

Nakashimada, Atsushi. (2001). Hair dye composition having a particular buffer capacity and containing an alkylene carbonate (U.S. Patent No. 6248314). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6248314

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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