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:
Jan. 03, 2017
Filed:
Jun. 25, 2015
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Mikio Sanada, Kawasaki, JP;
Taiki Watanabe, Akishima, JP;
Ryuji Higashi, Kawasaki, JP;
Koichi Suzuki, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D 11/324 (2014.01); C09D 11/30 (2014.01); C09D 11/322 (2014.01);
U.S. Cl.
CPC ...
C09D 11/324 (2013.01); C09D 11/30 (2013.01); C09D 11/322 (2013.01);
Abstract
The invention provides an aqueous ink containing a self-dispersible pigment having a carboxylic acid group bonded directly or through another atomic group to a particle surface of a pigment and a lactone group bonded to the particle surface of the pigment, wherein, as determined by a selective neutralization method, an introduced amount of the carboxylic acid group is 0.60 mmol/g or more and a ratio of an introduced amount (mmol/g) of the lactone group to the introduced amount (mmol/g) of the carboxylic acid group is 0.20 time or less.