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:
Aug. 22, 2006
Filed:
Aug. 06, 2004
Masahiro Hanmura, Nagano, JP;
Tetsuya Aoyama, Nagano, JP;
Masahiro Hanmura, Nagano, JP;
Tetsuya Aoyama, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
The present invention provides a black ink composition obtained by mixing at least one colorant selected from the group consisting of a compound represented by the following formula (1) and a salt thereof, one or more organic acids and one or more organic bases: wherein Rrepresents a phenyl group having a substituent group or a naphthyl group having a substituent group, Rrepresent a phenylene group having a substituent group or a naphthylene group having a substituent group, Rrepresents a 5- to 7-membered heterocyclic ring having at least one double bond and substituent group, and further, the above-mentioned substituent groups in the above-mentioned Rto Rare each independently selected from the group consisting of OH, SOH, POH, COH, NO, NH, a C1–4 alkyl group, a C1–4 alkyl group having a substituent group, a C1–4 alkoxyl group, a C1–4 alkoxyl group having a substituent group, an amino group, an amino group having a substituent group and a phenyl group having a substituent group. Further, a recording method and recorded matter using the above-mentioned black ink composition are also disclosed.