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:
Feb. 24, 2015
Filed:
Dec. 04, 2013
Keita Katoh, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Akihiko Matsuyama, Shizuoka, JP;
Masayasu Nonogaki, Shizuoka, JP;
Minoru Hakiri, Shizuoka, JP;
Kazukiyo Nagai, Shizuoka, JP;
Yuusuke Koizuka, Shizuoka, JP;
Keita Katoh, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Akihiko Matsuyama, Shizuoka, JP;
Masayasu Nonogaki, Shizuoka, JP;
Minoru Hakiri, Shizuoka, JP;
Kazukiyo Nagai, Shizuoka, JP;
Yuusuke Koizuka, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An ink for inkjet recording, which is used for recording on a paper having a concentration of an eluted Ca ion of from 1.0×10to 5.0×10g/g when dipped in pure water. The ink includes at least a pigment, a pigment dispersant, a water-soluble organic solvent and water. The pigment dispersant is a copolymer synthesized using at least (1) unsaturated ethylene monomer having a phosphoric acid group or a phosphonic acid group and (2) unsaturated ethylene monomer having an alkyl group having 12 to 22 carbon atoms.