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:
Nov. 08, 2005
Filed:
Sep. 12, 2003
Dominic Pratt, Darmstadt, DE;
Toshio Kawagishi, Minamiashigara, JP;
Dominic Pratt, Darmstadt, DE;
Toshio Kawagishi, Minamiashigara, JP;
Kao Corporation, Tokyo, JP;
Fuji Photo Film Co., Ltd., Minamiashigara, JP;
Abstract
Provided is a hair dye composition containing a dissociative direct dye represented by the following formula (1):wherein, Rto Reach represents H or substituent, X represents OH or —NHSOR, Rrepresents an alkyl, aryl or heterocyclic group, and A represents a divalent group capable of forming a methine dye as a whole compound, together with the portion other than A. The hair dye composition of the present invention is capable of strongly dyeing the hair with a vivid color tone without causing decomposition of the dye during the dyeing process, exhibits an excellent resistance against sunlight, hair washing, perspiration, friction and heat, has a high stability against an alkali agent and an oxidizing agent, has a high dyeing property, and has less color fade after the passage of time.