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:
Aug. 05, 2025
Filed:
May. 09, 2024
Canon Kabushiki Kaisha, Tokyo, JP;
Munehito Kurata, Shizuoka, JP;
Hisashi Nakahara, Shizuoka, JP;
Hirohiko Aiba, Shizuoka, JP;
Daisuke Sato, Ibaraki, JP;
Hideo Nanataki, Kanagawa, JP;
Masahito Omata, Kanagawa, JP;
Hiroyuki Sakakibara, Kanagawa, JP;
Takaaki Akamatsu, Kanagawa, JP;
Yoshihito Oshima, Kanagawa, JP;
Koichi Sugawara, Ibaraki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A grease composition for heat fixing devices contains a base oil and polytetrafluoroethylene. The base oil contains a perfluoropolyether having at least one of the structures represented by formulas (I) and (II) in the molecule and has a kinematic viscosity v40 of 800 mm/s to 2500 mm/s at 40° C., and whose kinematic viscosity v200 at 200° C. is 1/50 or less of the kinematic viscosity v40.