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. 28, 2021
Filed:
Aug. 13, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Ryuji Murayama, Nagareyama, JP;
Takaho Shibata, Tokyo, JP;
Junichi Tamura, Toride, JP;
Kenta Mitsuiki, Toride, JP;
Megumi Shino, Kashiwa, JP;
Hironori Minagawa, Moriya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner comprises a toner particle including a binder resin, and inorganic fine particles A and silica particles B, wherein the inorganic fine particle A has a rectangular parallelepiped shape; an amount of the inorganic fine particles A is 0.3 to 3.0 mass parts per 100 mass parts of the toner particles; a number average particle diameter of the silica particles B is 80 to 200 nm; a fixing ratio of the inorganic fine particle A is 25% to 70%; where a separation amount of the inorganic fine particles A is denoted by YA (mg), and a separation amount of the silica particles is denoted by YB (mg), YA is 3.00 to 18.0, YA and YB satisfy the following formula,>0.75, and a surface potential difference C in a rubbing test using the inorganic fine particle A and the binder resin is −70 V to +70 V.