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. 14, 2026
Filed:
Jun. 28, 2020
Dic Corporation, Tokyo, JP;
Shumei Ji, Qingdao, CN;
Issei Masuko, Kamisu, JP;
Masaki Hosaka, Kamisu, JP;
Kyoichi Okada, Kamisu, JP;
Nagatoshi Kobayashi, Kamisu, JP;
Xiyang Liao, Qingdao, CN;
Wei Zhao, Qingdao, CN;
DIC CORPORATION, Tokyo, JP;
Abstract
The issue of the present invention is to provide a disazo pigment with high safety in which the content of chemical substances that may be harmful, in particular, in the food packaging field and the like and that may be regulated substances is reduced. A disazo pigment according to the present invention has a polychlorinated biphenyl content of less than 15 ppm and a primary aromatic amine content of less than 700 ppm. Preferably, the disazo pigment is at least one selected from a group consisting of C.I. Pigment Yellow 83, C.I. Pigment Yellow 13, and Cl. Pigment Yellow 14.