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. 28, 2026
Filed:
Mar. 31, 2022
Kyocera Document Solutions Inc., Osaka, JP;
Tamotsu Shimizu, Osaka, JP;
Kohei Terasaki, Osaka, JP;
Yuma Uchihashi, Osaka, JP;
Eriko Takeuchi, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
In a two-component developer, external additive particles of toner particles include resin particles containing a thermoplastic resin. Coat layers of carrier particles contain a coating resin and barium titanate particles. The coating resin includes a silicone resin. The barium titanate particles have a number average primary particle diameter of 100-500 nm. The barium titanate particles have a content of 4-45 parts by mass relative to 100 parts by mass of the coating resin. The rate of the mass of the coat layers to the mass of the carrier cores is 0.10-4.90% by mass. The average of coverage rates of the carrier cores is at least 80.0% and less than 100.0%.