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. 27, 2026
Filed:
Jun. 18, 2024
Canon Kabushiki Kaisha, Tokyo, JP;
Tomoyo Miyakai, Tokyo, JP;
Kosuke Tanaka, Chiba, JP;
Ryunosuke Kawahara, Ibaraki, JP;
Akeshi Asaka, Chiba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An electrophotographic member comprising: at least a base layer; an elastic layer; and a surface layer in this order, wherein the surface layer comprises a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, at an endothermic curve upon performing two measurements at a ramp up rate and a ramp down rate both set at 20° C./min using a differential scanning calorimeter (DSC) with a sample sampled from the surface layer as a measurement sample, an endothermic peak temperature in a second temperature raising process is 304° C. or less, an endothermic quantity in a first temperature raising process is 21J/g or more, and D3 is 40 μm or less, where D3 represents an area average diameter of a spherulite at an outer surface of the surface layer.