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. 07, 2015
Filed:
Jan. 14, 2014
Shigeyuki Harada, Shizuoka, JP;
Tamotsu Aruga, Shizuoka, JP;
Hiroshi Gotou, Shizuoka, JP;
Hidetoshi Fujii, Shizuoka, JP;
Shigeyuki Harada, Shizuoka, JP;
Tamotsu Aruga, Shizuoka, JP;
Hiroshi Gotou, Shizuoka, JP;
Hidetoshi Fujii, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A copolymer contains repeating units represented by the following chemical formulae 1 and 2: In the chemical formulae 1 and 2, R represents a hydrogen atom or a cation; X represents an alkylene group having 2 to 18 carbon atoms; Y represents a single bond, an oxycarbonyl group [(X)—O—CO—(Z)], a carbonyloxy group [(X)—CO—O—(Z)], an ether group (—O—), or an imido group [(X)—N—CO—(—CO—)(Z)]; and Z represents a biphenyl group or a naphthyl group).