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:
Aug. 31, 2021
Filed:
Apr. 06, 2020
Applicant:
Fujifilm Business Innovation Corp., Tokyo, JP;
Inventors:
Daisuke Noguchi, Kanagawa, JP;
Yuka Yamagishi, Kanagawa, JP;
Sakiko Takeuchi, Kanagawa, JP;
Kazuhiko Nakamura, Kanagawa, JP;
Yutaka Saito, Kanagawa, JP;
Assignee:
FUJIFILM Business Innovation Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/08 (2006.01); G03G 9/113 (2006.01); G03G 21/18 (2006.01); G03G 15/08 (2006.01); G03G 9/097 (2006.01);
U.S. Cl.
CPC ...
G03G 9/0819 (2013.01); G03G 9/0821 (2013.01); G03G 9/09708 (2013.01); G03G 9/1138 (2013.01); G03G 9/1139 (2013.01); G03G 15/0865 (2013.01); G03G 21/1814 (2013.01);
Abstract
An electrostatic charge image development toner that is negatively chargeable contains toner particles and layered-structure compound particles. The layered-structure compound particles have a volume-average particle diameter Da of 0.4 μm or more and less than 3.0 μm. The ratio Da/Db of the volume-average particle diameter Da of the layered-structure compound particles to the volume-average particle diameter Db of the toner particles is 0.044 or more and 0.625 or less.