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:
Aug. 04, 2015
Filed:
Apr. 23, 2014
Hideaki Yasunaga, Osaka, JP;
Keiichiro Juri, Hyogo, JP;
Yuta Takeuchi, Hyogo, JP;
Tsuyoshi Nozaki, Osaka, JP;
Yoshimichi Ishikawa, Hyogo, JP;
Tomoharu Miki, Osaka, JP;
Hideaki Yasunaga, Osaka, JP;
Keiichiro Juri, Hyogo, JP;
Yuta Takeuchi, Hyogo, JP;
Tsuyoshi Nozaki, Osaka, JP;
Yoshimichi Ishikawa, Hyogo, JP;
Tomoharu Miki, Osaka, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A developing roller, including: a shaft containing a metal; an elastic layer on a circumference of the shaft; and a surface layer on a circumferential surface of the elastic layer, wherein the surface layer contains: a polyurethane which is a reaction product between a fluoroethylene vinyl ether copolymer and an isocyanurate form of an isocyanate; and particles having an average primary particle diameter of 5 nm to 30 nm, and wherein the polyurethane has a peak intensity ratio of a NCO group to a hydroxyl group of 5.6 to 8.8 in an infrared absorption spectrum obtained by an attenuated total reflection method.