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:
Apr. 21, 2026
Filed:
Mar. 10, 2023
Applicants:
Masahiro Yukikawa, Kanagawa, JP;
Akio Takei, Shizuoka, JP;
Akinori Saito, Shizuoka, JP;
Hideto Suzuki, Shizuoka, JP;
Inventors:
Masahiro Yukikawa, Kanagawa, JP;
Akio Takei, Shizuoka, JP;
Akinori Saito, Shizuoka, JP;
Hideto Suzuki, Shizuoka, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/08 (2006.01); G03G 9/087 (2006.01);
U.S. Cl.
CPC ...
G03G 9/0827 (2013.01); G03G 9/0806 (2013.01); G03G 9/0821 (2013.01); G03G 9/08755 (2013.01);
Abstract
A toner includes toner matrix particles containing resin and wax; and an external additive, wherein an average number of voids per toner is 5 or more and 10 or less per toner with a void diameter Φ (nm) of voids in the toner matrix particles being 500≥Φ≥200, as measured based on cross-sectional observation by a scanning electron microscope (SEM).