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. 08, 2020
Filed:
Aug. 26, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Daisuke Tsujimoto, Tokyo, JP;
Toru Takahashi, Toride, JP;
Hiroki Watanabe, Matsudo, JP;
Yoshihiro Ogawa, Toride, JP;
Wakashi Iida, Toride, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner having a toner particle, which contains a binder resin, and inorganic fine particles, the toner being characterized in that the binder resin contains a polyester resin, the polyester resin has, at a terminal, an alkyl group having an average number of carbon atoms of from 4 to 102, the number average particle diameter of primary particles of the inorganic fine particles is from 10 to 90 nm, the dielectric constant of the inorganic fine particles is from 55.0 to 100.0 pF/m, as measured at 25° C. and 1 MHz, and the inorganic fine particles are surface-treated with an alkylalkoxysilane represented by formula (1) below:CH—SiOCH)  (1)in formula (1), n denotes an integer of from 4 to 20, and m denotes an integer of from 1 to 3.