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:
Oct. 21, 2008
Filed:
Aug. 20, 2004
Hiroaki Saikatsu, Tokyo, JP;
Shigeru Sakamoto, Tokyo, JP;
Masanori Takakamo, Tokyo, JP;
Seishichi Sasaki, Tokyo, JP;
Hiromitsu Yanagimoto, Tokyo, JP;
Yoshimasa Tsuchiya, Tokyo, JP;
Tetsuo Fukuda, Tokyo, JP;
Akio Yoshida, Tokyo, JP;
Hiroaki Saikatsu, Tokyo, JP;
Shigeru Sakamoto, Tokyo, JP;
Masanori Takakamo, Tokyo, JP;
Seishichi Sasaki, Tokyo, JP;
Hiromitsu Yanagimoto, Tokyo, JP;
Yoshimasa Tsuchiya, Tokyo, JP;
Tetsuo Fukuda, Tokyo, JP;
Akio Yoshida, Tokyo, JP;
Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo, JP;
Abstract
A dispersant for an organic pigment contains a compound represented by the following formula (1): wherein Rand Rmay be the same or different and each independently represents a hydrogen atom, a halogen atom, a hydroxyl group, a primary, secondary or tertiary amino group, an alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted phthalimidomethyl group, Rand Rmay be the same or different and each independently represents a hydrogen atom or a lower alkyl group, and n means an average number of introduced sulfonic groups and stands for a number of from 0.5 to 3; or at least one salt selected from the group consisting of its metal salt, ammonium salt, organic amine salt, and organic quaternary ammonium salt. Also disclosed are a readily-dispersing pigment composition, a pigment dispersion, a colored coating fluid for color filters, a fabrication process of a color filter and a color filter, all of which make use of the dispersant.