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:
Jun. 10, 2014
Filed:
Feb. 15, 2011
Masaaki Harada, Mishima, JP;
Hiroaki Watanabe, Odawara, JP;
Keiji Nose, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
To provide a charging member that can have a uniform electrical resistance, can not easily change in electrical resistance even by any long-term continuous electrification and, as a result thereof, may cause less change in its charging performance with time. A charging member having a conductive support and an elastic-material layer; the elastic-material layer comprising a vulcanized rubber; the vulcanized rubber being a vulcanized product of a composition which comprises i) a binder polymer comprising a polymer having a butadiene skeleton and ii) carbon black as electrically conductive particles; and the polymer having a butadiene skeleton has a molecular terminal modified with an atomic group having a specific structure.