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:
May. 13, 2019
Kyocera Document Solutions Inc., Osaka, JP;
Takamichi Mori, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
A positively chargeable toner includes toner particles. The toner particles each include a toner mother particle containing a binder resin, and an external additive adhering to a surface of the toner mother particle. The external additive includes specific silica particles, specific titania particles, and specific crosslinked resin particles. The specific silica particles each include a silica base, and a first surface treatment layer present on a surface of the silica base. The first surface treatment layer has an alkyl group having a carbon number of at least 8 and no greater than 16, and an amino group. The specific titania particles each include a titania base, and a second surface treatment layer present on a surface of the titania base. The second surface treatment layer has an alkyl group having a carbon number of at least 3 and no greater than 8.