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:
Jan. 20, 2015
Filed:
Jul. 20, 2011
Applicants:
Kenichi Kaku, Newcastle Upon Tyne, GB;
Wataru Kitamura, Numazu, JP;
Mai Murakami, Numazu, JP;
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/04 (2006.01); G03G 5/04 (2006.01); G03G 5/14 (2006.01);
U.S. Cl.
CPC ...
G03G 5/04 (2013.01); G03G 5/142 (2013.01); G03G 5/144 (2013.01);
Abstract
In order to provide an electrophotographic photosensitive member in which the dark-area potential does not easily change even when repeatedly used for a long period of time under a normal temperature/low humidity environment, a method of producing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus, each comprising the electrophotographic photosensitive member, an undercoat layer of the electrophotographic photosensitive member is incorporated with an organic resin, a metal oxide particle, and a specific compound (phosphine oxide compound).