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:
Jan. 20, 2026
Filed:
Dec. 20, 2022
Taishi Yamashita, Shizuoka, JP;
Yohichi Kitagawa, Shizuoka, JP;
Tsukiko Takahashi, Shizuoka, JP;
Mitsuaki Hirose, Shizuoka, JP;
Daisuke Inoue, Shizuoka, JP;
Taishi Yamashita, Shizuoka, JP;
Yohichi Kitagawa, Shizuoka, JP;
Tsukiko Takahashi, Shizuoka, JP;
Mitsuaki Hirose, Shizuoka, JP;
Daisuke Inoue, Shizuoka, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A toner includes toner particles. Each of the toner particles includes a toner base particle including a binder resin, resin particles covering the toner base particle, and zinc stearate particles serving as an external additive. In each of the toner particles, a coverage rate of the toner base particle with the resin particles is 30% or greater and 70% or less. The zinc stearate particles have a volume average particle diameter of 3 μm or greater and 20 μm or less.