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:
Apr. 13, 2021
Filed:
Dec. 27, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Kentaro Yamawaki, Mishima, JP;
Shohei Kototani, Suntou-gun, JP;
Noriyoshi Umeda, Suntou-gun, JP;
Tomonori Matsunaga, Suntou-gun, JP;
Shohei Tsuda, Suntou-gun, JP;
Satoshi Otsuji, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a toner including a toner particle containing a binder resin, and an external additive, wherein the external additive contains an external additive A and an external additive B, the external additive A is an organosilicon polymer fine particle, the number-average particle diameter of primary particles of the organosilicon polymer fine particle is from 30 to 300 nm, the external additive B is a silica fine particle, the number-average particle diameter of primary particles of the silica fine particle is from 100 to 300 nm, the fixing rate of the external additive A to the toner particle according to a water washing method is less than 30%, and the fixing rate of the external additive B to the toner particle according to the washing method is at least 30%.