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. 12, 2004
Filed:
Apr. 11, 2001
Hidehiko Komatsu, Nagano, JP;
Hiroto Nakamura, Nagano, JP;
Masahiro Yatake, Nagano, JP;
Hiroko Hayashi, Nagano, JP;
Makoto Matsuzaki, Nagano, JP;
Fumitsugu Ito, Nagano, JP;
Hitoshi Ohta, Nagano, JP;
Seiko Epson Corporation, Toyko, JP;
Abstract
An ink for ink jet recording including at least a particulate pigment having a sulfur-containing dispersibility providing group chemically bonded to the pigment surface with a treatment containing sulfur, a penetrating agent and a liquid component including water. In one embodiment, the liquid component includes polyvalent metal ions and has a sulfur content that is 2,000 ppm or less as calculated in terms of SO . In other embodiments, the ink has (a) a sulfonic acid anion group or a sulfinic acid anion group and an alkaline metal or monovalent counter ion; (b) a penetrating agent having the formula R—EOn —POm —X; and (c) a sulfur-containing dispersibility providing group in an amount of 10×10 equivalent or more per gram of particulate pigment.