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:
Jun. 09, 2026
Filed:
Sep. 29, 2022
Kazumasa Tabata, Shizuoka, JP;
Akio Takei, Shizuoka, JP;
Hiroshi Yamada, Shizuoka, JP;
Toma Takebayashi, Shizuoka, JP;
Ryuuta Yoshida, Shizuoka, JP;
Kazumasa Tabata, Shizuoka, JP;
Akio Takei, Shizuoka, JP;
Hiroshi Yamada, Shizuoka, JP;
Toma Takebayashi, Shizuoka, JP;
Ryuuta Yoshida, Shizuoka, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A toner includes toner base particles each containing a binder resin and a release agent, and resin particles on a surface of each of the toner base particles. A ratio (Iw/Ir) is 0.10 or more and 0.30 or less, where Ir is a peak height of the binder resin and Iw is a peak height of the release agent, as measured through attenuated total reflection (ATR). A standard deviation σ (nm) of distances L (nm) between the resin particles that are adjacent to each other on the surface of each of the toner base particles is 150 nm or more and 500 nm or less.