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:
Nov. 24, 2020
Filed:
Jan. 08, 2019
Ricoh Company, Ltd., Tokyo, JP;
Yuusuke Koizuka, Shizuoka, JP;
Kazukiyo Nagai, Shizuoka, JP;
Tomoyuki Shimada, Shizuoka, JP;
Shigeyuki Harada, Shizuoka, JP;
Akihiko Matsuyama, Shizuoka, JP;
Yoshiki Yanagawa, Shizuoka, JP;
Koichiro Oyama, Kanagawa, JP;
Takuya Yamazaki, Shizuoka, JP;
Akiyoshi Sabu, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
Ink includes water, a coloring material, and a copolymer including a first structure unit represented by the following Chemical formula 1 and a second structure unit including an anionic group. In the Chemical formula, R represents a hydrogen atom or a methyl group, X represents an alkylene group having 2-4 carbon atoms, and Y represents a substituted or non-substituted straight-chain alkylene group having 5 to 7 carbon atoms.