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:
Mar. 12, 2013
Filed:
Nov. 19, 2010
Kenji Moribe, Fujisawa, JP;
Mikio Sanada, Kawasaki, JP;
Yasuhito Mori, Kawasaki, JP;
Junichi Sakai, Machida, JP;
Kenji Moribe, Fujisawa, JP;
Mikio Sanada, Kawasaki, JP;
Yasuhito Mori, Kawasaki, JP;
Junichi Sakai, Machida, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a set of a reaction liquid that has a buffering action against pH change and exhibits a pH of 3.5 or more and 5.5 or less, and an ink that has a higher pH than the reaction liquid. The ink comprises a pigment to a surface of a pigment particle of which a basic group that forms a cation form at the pH of the reaction liquid is bonded. The pigment does not have an acidic group having a pKa equal to or less than the pH of the reaction liquid. The pigment is dispersed by a water-soluble polymer that has an acidic group having a pKa equal to or more than the pH of the reaction liquid and equal to or less than the pH of the ink.