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:
Nov. 17, 2009
Filed:
Apr. 22, 2008
Ink jet ink, ink jet recording method, ink cartridge, recording unit and ink jet recording apparatus
Kuniaki Fujimoto, Chofu, JP;
Jun Yoshizawa, Tokyo, JP;
Minako Kawabe, Koganei, JP;
Daiji Okamura, Yokohama, JP;
Kuniaki Fujimoto, Chofu, JP;
Jun Yoshizawa, Tokyo, JP;
Minako Kawabe, Koganei, JP;
Daiji Okamura, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides an ink jet ink having a magenta color which gives an image excellent in magenta color tone and also excellent in image fastness (lightfastness and gas resistance). The ink jet ink includes a first coloring material that is an anthrapyridone compound having a structure represented by general formula (I) and/or general formula (II) and a second coloring material that is an azo compound having a structure represented by general formula (III), wherein the mass ratio of the content of the first coloring material to the content of the second coloring material is from 2.5 or more to 10.0 or less.