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:
Apr. 26, 2016
Filed:
Apr. 01, 2015
Keita Katoh, Shizuoka, JP;
Shigeyuki Harada, Shizuoka, JP;
Masayuki Fukuoka, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Masayasu Nonogaki, Shizuoka, JP;
Akihiko Matsuyama, Shizuoka, JP;
Kazukiyo Nagai, Shizuoka, JP;
Yuusuke Koizuka, Shizuoka, JP;
Keita Katoh, Shizuoka, JP;
Shigeyuki Harada, Shizuoka, JP;
Masayuki Fukuoka, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Masayasu Nonogaki, Shizuoka, JP;
Akihiko Matsuyama, Shizuoka, JP;
Kazukiyo Nagai, Shizuoka, JP;
Yuusuke Koizuka, 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 phosphonic acid group. The copolymer including a phosphonic acid group includes structural units having the following formulae (1) and (2): wherein R1 represents a hydrogen atom or a methyl group; and M represents a hydrogen atom, an alkali metal or an organic ammonium; and wherein R2 represents a hydrogen atom or a methyl group; R3 represents an alkyl group having 1 to 4 carbon atoms; and each of n and m represents 0 or an integer of from 1 to 30, provided n+m is from 2 to 30.