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:
May. 16, 2006
Filed:
Aug. 26, 2003
Takakazu Tanaka, Shizuoka, JP;
Itaru Takaya, Kanagawa, JP;
Harunobu Ogaki, Shizuoka, JP;
Kenichi Kaku, Shizuoka, JP;
Takakazu Tanaka, Shizuoka, JP;
Itaru Takaya, Kanagawa, JP;
Harunobu Ogaki, Shizuoka, JP;
Kenichi Kaku, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an electrophotographic photosensitive member having a support, and provided thereon a photosensitive layer, a surface layer of the electrophotographic photosensitive member contains a high-molecular-weight charge-transporting material having a weight-average molecular weight Mw of from 1,000 or more to 9,000 or less, and the ratio of the weight-average molecular weight Mw of the high-molecular-weight charge-transporting material to a number-average molecular weight Mn of the high-molecular-weight charge-transporting material, Mw/Mn, is from more than 1.00 to 1.10 or less. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.