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:
Jul. 09, 2019
Filed:
Jun. 27, 2018
Kyocera Document Solutions Inc., Osaka, JP;
Sho Sumioka, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
Toner particles each include a toner mother particle and a plurality of C/S external additive particles. The toner mother particle contains a polyester resin. The C/S external additive particles each adhere to a surface of the toner mother particle and include a core particle and a plurality of shell particles. The shell particles each adhere to a surface of the core particle. The shell particles have a number average primary particle diameter of no greater than 0.40 times a number average primary particle diameter of the core particles. The core particles and the shell particles each contain a resin. The core particles have a hydrophobicity degree of at least 30%. The shell particles have a hydrophobicity degree of no greater than 5%. The C/S external additive particles have a hydrophobicity degree of at least 15% and no greater than 25%.