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:
Mar. 17, 2026
Filed:
Aug. 13, 2024
Canon Kabushiki Kaisha, Tokyo, JP;
Seiji Tsuru, Shizuoka, JP;
Hiroaki Komatsu, Shizuoka, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An electrophotographic roller comprising a substrate having a conductive surface and a conductive layer on the surface of the substrate, wherein the conductive layer is a surface layer of the electrophotographic roller, and has a skeleton comprising polyurethane and an electron conductive filler in the polyurethane, the conductive layer comprises at least one void, and at least a part of an inner wall of the void is configured of the skeleton, and when an electrode is brought into contact with an outer surface of the conductive layer and an AC voltage with an inter-peak voltage of 50 V is applied between the electrode and the surface of the substrate in a frequency range of 0.1 to 10 Hz, an absolute value of a phase delay θ of an AC impedance with respect to the AC voltage is 10 degrees or less.