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:
Oct. 04, 2011
Filed:
Feb. 20, 2009
Mitsuru Ishii, Kamagaya, JP;
Hiroshi Tomioka, Tokyo, JP;
Daiji Okamura, Yokohama, JP;
Hideki Yamakami, Kawasaki, JP;
Satoshi Kudo, Kawasaki, JP;
Otome Mori, Yokohama, JP;
Mitsuru Ishii, Kamagaya, JP;
Hiroshi Tomioka, Tokyo, JP;
Daiji Okamura, Yokohama, JP;
Hideki Yamakami, Kawasaki, JP;
Satoshi Kudo, Kawasaki, JP;
Otome Mori, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides an ink jet ink, which gives a superior lightfastness to an ink image, has a superior sticking resistance and intermittent ejection stability, and gives a preferable color tone to the image. The ink includes an azo-based dye represented by formula (I) and a water-soluble organic solvent represented by bis(2-hydroxyethyl)sulfone represented by formula (II).