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:
Jul. 09, 2019
Filed:
Apr. 14, 2017
Applicant:
Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/20 (2006.01); C09B 56/02 (2006.01); C09B 67/42 (2006.01);
U.S. Cl.
CPC ...
C09B 56/02 (2013.01); G02B 5/20 (2013.01); G02B 5/208 (2013.01); C09B 67/0092 (2013.01);
Abstract
There are provided: a near-infrared non-absorbing black azo pigment having a sufficient blackness, having an excellent durability such as solvent resistance, and having a novel skeleton; and a colorant that uses the black azo pigment and is useful for forming a black matrix or a light-shielding film. The black azo pigment is represented by the following formula (1), wherein Rrepresents an aryl group optionally having a substituent. In addition, the colorant contains the black azo pigment and is suitable as a material or the like for forming a black matrix for a color filter or for forming a light-shielding film.