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:
May. 01, 2012
Filed:
Dec. 28, 2006
Takahiko Matsui, Kita-ku, JP;
Yoshiyuki Dejima, Kita-ku, JP;
Takashi Yoshimoto, Kita-ku, JP;
Ryoutarou Morita, Kita-ku, JP;
Koji Hirota, Kita-ku, JP;
Takahiko Matsui, Kita-ku, JP;
Yoshiyuki Dejima, Kita-ku, JP;
Takashi Yoshimoto, Kita-ku, JP;
Ryoutarou Morita, Kita-ku, JP;
Koji Hirota, Kita-ku, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to a trisazo compound represented by the following formula (1) or a salt thereof, The formula (1) wherein, the group A is a substituted phenyl group, the group B and the group C are substituted para-phenylene groups, Rrepresents a C1 to C4 alkyl group which may be substituted by a carboxy group, a phenyl group which may be substituted by a sulfo group, or a carboxy group, Rrepresents a cyano group, a carbamoyl group or a carboxy group, each of Rand Rindependently represents a hydrogen atom, a methyl group, a chlorine atom or a sulfo group, respectively and a water-based black ink composition containing said compound; said compound has high solubility in a medium where the main component is water, its aqueous solution having a high concentration and ink are stable when stored for a long period of time, black-recorded images with it can be provided where both light fastness and ozone gas fastness of the printed images are excellent.