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:
Feb. 15, 2011
Filed:
Jul. 26, 2005
Naoki Hirata, Tokyo, JP;
Hisao Okamoto, Tokyo, JP;
Yoshiyuki Zama, Tokyo, JP;
Michiei Nakamura, Tokyo, JP;
Tetsuya Yanagimoto, Kisarazu, JP;
Hiroaki Yamada, Kisarazu, JP;
Masahiro Tsuchiya, Kisarazu, JP;
Naoki Hirata, Tokyo, JP;
Hisao Okamoto, Tokyo, JP;
Yoshiyuki Zama, Tokyo, JP;
Michiei Nakamura, Tokyo, JP;
Tetsuya Yanagimoto, Kisarazu, JP;
Hiroaki Yamada, Kisarazu, JP;
Masahiro Tsuchiya, Kisarazu, JP;
Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo, JP;
Abstract
This present invention can provide a novel pigment useful in color image displays to form blue pixels capable of providing high-level brightness and saturation, especially a finely-divided pigment which has bright hue and is excellent in pigment physical properties such as light fastness, solvent resistance and heat resistance, and a process for producing the same, a pigment dispersion making use of the pigment, and an ink for a color filters. The novel pigment is produced by forming into a pigment a subphthalocyanine represented by the following formula (1): wherein X is a halogen atom, presents diffraction peaks at diffraction angles (2θ) 7.0°, 12.3°, 20.4° and 23.4° in x-ray diffraction, and has an average particle size of 120 to 20 nm.