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:
Dec. 22, 2015
Filed:
Aug. 06, 2014
Kazukiyo Nagai, Shizuoka, JP;
Yuusuke Koizuka, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Masayasu Nonogaki, Shizuoka, JP;
Akihiko Matsuyama, Shizuoka, JP;
Keita Katoh, Shizuoka, JP;
Shigeyuki Harada, Shizuoka, JP;
Masayuki Fukuoka, Shizuoka, JP;
Kazukiyo Nagai, Shizuoka, JP;
Yuusuke Koizuka, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Masayasu Nonogaki, Shizuoka, JP;
Akihiko Matsuyama, Shizuoka, JP;
Keita Katoh, Shizuoka, JP;
Shigeyuki Harada, Shizuoka, JP;
Masayuki Fukuoka, Shizuoka, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
An ink for inkjet recording includes water; a hydrosoluble solvent, a pigment, and a copolymer including a salt of a diphosphonic acid group. The copolymer including a salt of a diphosphonic acid group includes structural units having the following formulae (1) and (2): X represents an alkylene group having 1 to 3 carbon atoms, each of Rand Rrepresents a hydrogen atom or a methyl group, Mrepresents an alkali metal ion, an organic ammonium ion or a proton and Zrepresents a hydrocarbon group having 6 to 22 carbon atoms. The alkali metal ion or the organic ammonium ion and the proton may be mixed, and half or more of the Mare alkali metal ions or the organic ammonium ions.