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:
Sep. 07, 2021
Filed:
Jan. 23, 2020
Applicant:
Powdertech Co., Ltd., Kashiwa, JP;
Inventors:
Hiroki Sawamoto, Kashiwa, JP;
Atsushi Nil, Kashiwa, JP;
Yuji Ito, Kashiwa, JP;
Hajime Akiba, Kashiwa, JP;
Shinya Hanyu, Kashiwa, JP;
Assignee:
POWDERTECH CO., LTD., Chiba, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/00 (2006.01); G03G 9/107 (2006.01); G03G 9/08 (2006.01);
U.S. Cl.
CPC ...
G03G 9/1075 (2013.01); G03G 9/0808 (2013.01); G03G 9/107 (2013.01); G03G 9/1085 (2020.08);
Abstract
The present invention relates to a carrier core material for electrophotographic developer, having a ferrite composition and having a supernatant transmittance of 85.0% or more, a method for producing the carrier core material, a carrier for electrophotographic developer, containing the carrier core material, and a developer containing the carrier.