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:
Mar. 29, 2022
Filed:
Apr. 22, 2020
Applicant:
Ricoh Company, Ltd., Tokyo, JP;
Inventors:
Hisashi Nakajima, Shizuoka, JP;
Akihiro Kaneko, Shizuoka, JP;
Yoshitaka Yamauchi, Shizuoka, JP;
Katsunori Kurose, Shizuoka, JP;
Hyo Shu, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/097 (2006.01); G03G 9/08 (2006.01);
U.S. Cl.
CPC ...
G03G 9/0827 (2013.01); G03G 9/0819 (2013.01); G03G 9/0821 (2013.01);
Abstract
A toner including a strontium titanate powdery material as an external additive, the strontium titanate powdery material including Si-containing particles on a surface of the strontium titanate powdery material, the Si-containing particles having a number average circle equivalent diameter of 5 nm or more but 15 nm or less.