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. 24, 2015
Filed:
Nov. 08, 2011
Yoshihisa Yamashita, Kawasaki, JP;
Takashi Saito, Yokohama, JP;
Tsuyoshi Furuse, Isehara, JP;
Nobuyuki Matsumoto, Tokyo, JP;
Yoshihisa Yamashita, Kawasaki, JP;
Takashi Saito, Yokohama, JP;
Tsuyoshi Furuse, Isehara, JP;
Nobuyuki Matsumoto, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink jet ink contains a resin A, a resin B, and a pigment, in which the pigment is a halogenated metal phthalocyanine pigment being dispersed by the resin B, the resin A is a random copolymer having a carboxy group, the resin B is a block copolymer having a carboxy group, the acid value of the resin A is less than the acid value of the resin B, and the ink further includes a polybasic acid having a functional group whose pKa is 4.3 or less and a functional group whose pKa is 5.0 or more and 6.6 or less.