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. 15, 2021
Filed:
Jan. 31, 2020
Kohtaroh Ogino, Shizuoka, JP;
Masayuki Ishii, Shizuoka, JP;
Masayuki Kakimoto, Shizuoka, JP;
Shohichi Sugimoto, Shizuoka, JP;
Kohtaroh Ogino, Shizuoka, JP;
Masayuki Ishii, Shizuoka, JP;
Masayuki Kakimoto, Shizuoka, JP;
Shohichi Sugimoto, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner is provided which includes: a toner base particle including a binder resin; and an external additive including inorganic particles. A particle size distribution of primary particles of the inorganic particles has a plurality of peaks in the range of from 5 nm through 50 nm. The particle size distribution of the primary particles satisfies all of expressions (1) to (3) below:12  (1);10<(12)  (2); and30≤{(21)×100}<100  (3),