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:
Sep. 15, 2026
Filed:
May. 20, 2025
Canon Kabushiki Kaisha, Tokyo, JP;
Kazuaki Nagaoka, Shizuoka, JP;
Atsushi Noguchi, Shizuoka, JP;
Yoshitaka Suzumura, Shizuoka, JP;
Yuki Nasuno, Shizuoka, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An electrophotographic conductive roller including, in this order, a conductive substrate, an ion-conductive elastic layer, and a surface layer, the surface layer includes a resin and carbon black, and the carbon black in the surface layer has an arithmetic mean Rc of circle-equivalent diameters of 60.0 nm or less and a σc/Rc of 0.000 to 0.650, where σc (nm) is a standard deviation of the circle-equivalent diameter. The carbon black in the surface layer has an arithmetic mean d of inter-wall distances of 80.0 to 150.0 nm and a σd/d of 0.000 to 0.600, where σd (nm) is a standard deviation of inter-wall distances.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile