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:
Apr. 30, 2013
Filed:
Jan. 27, 2011
Nobuyuki Matsumoto, Tokyo, JP;
Fumiaki Fujioka, Kawasaki, JP;
Nobuyuki Matsumoto, Tokyo, JP;
Fumiaki Fujioka, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink contains a plurality of pigments and a plurality of polymers. The plurality of pigments include C.I. pigment yellow 4 and C.I. pigment yellow 128. The plurality of polymers include a polymer A and a polymer B. The C.I. pigment yellow 74 is dispersed by the polymer A. The C.I. pigment yellow 128 is dispersed by the polymer B. A hydrogen bond parameter Yof a unit having the smallest hydrogen bond parameter of the constitutional units of the polymer A and a hydrogen bond parameter Yof a unit having the smallest hydrogen bond parameter of the constitutional units of the polymer B satisfy the relationship of Y<Y. A hydrogen bond parameter Pof the polymer A and a hydrogen bond parameter Pof the polymer B satisfy the relationship of P<P.