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:
Jun. 03, 2014
Filed:
Jun. 27, 2011
Akira Kawaguchi, Tokyo, JP;
Takahiko Matsui, Tokyo, JP;
Takashi Yoshimoto, Tokyo, JP;
Kenji Ooshima, Tokyo, JP;
Akira Kawaguchi, Tokyo, JP;
Takahiko Matsui, Tokyo, JP;
Takashi Yoshimoto, Tokyo, JP;
Kenji Ooshima, Tokyo, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
A water-based black ink composition which exhibits a low intensity, colorless and neutral black color and provides a black recorded image the printed image of which has high density. The ink composition includes at least one compound represented by formula (1) or a salt thereof and an azo compound having λmax within the range of 550-660 nm. In the formula (1), Rto Rindependently represent a hydrogen atom; a halogen atom; a sulfo group; a carboxy group; a sulfamoyl group; a carbamoyl group; a C1-C4 alkyl group; a C1-C4 alkoxy group; and a C1-C4 alkoxy group substituted with at least one group selected from a group consisting of a hydroxy group, a C1-C4 alkoxy group, a hydroxy C1-C4 alkoxy group, a sulfo group and a carboxy group. X represents a bivalent cross-linking group.