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:
May. 20, 2025
Filed:
Aug. 12, 2021
Hiroshi Yamada, Shizuoka, JP;
Akinori Saitoh, Shizuoka, JP;
Akio Takei, Shizuoka, JP;
Yasuo Kamada, Shizuoka, JP;
Toma Takebayashi, Shizuoka, JP;
Hiroshi Yamada, Shizuoka, JP;
Akinori Saitoh, Shizuoka, JP;
Akio Takei, Shizuoka, JP;
Yasuo Kamada, Shizuoka, JP;
Toma Takebayashi, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner includes toner particles, each including: a toner base particle including a binder resin, a colorant, and wax; and resin particles on a surface of the toner base particle, wherein Formulae 1 to 3 below are satisfied, where M is a volume average primary particle diameter (nm) of the resin particles, and L is a distance (nm) between the resin particles present next to one another on the surface of the toner base particle: (Formula 1)5 (nm)<≤60 (nm); and (Formula 2)0.40≤[(nm)/(nm)]<0.90. (Formula 3)