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. 30, 2024
Filed:
Apr. 06, 2023
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Ryosuke Takayama, Shizuoka, JP;
Hiroaki Komatsu, Shizuoka, JP;
Koji Yatsu, Shizuoka, JP;
Seiji Tsuru, Shizuoka, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/08 (2006.01); G03G 21/00 (2006.01);
U.S. Cl.
CPC ...
G03G 15/0808 (2013.01); G03G 21/0058 (2013.01);
Abstract
An electrophotographic roller comprising a substrate and a foam layer on an outer peripheral surface of the substrate, the foam layer constituting an outer surface of the electrophotographic roller, the foam layer comprising cells each of which opens on the outer surface, and the foam layer having a zero-point charge measured using a standard carrier of 40 μC/g or more.