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:
May. 03, 2016
Filed:
Sep. 25, 2014
Applicants:
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Dowa Ip Creation Co., Ltd., Okayama, Okayama, JP;
Inventors:
Takeshi Kawauchi, Okayama, JP;
Sho Ogawa, Okayama, JP;
Assignees:
DOWA ELECTRONICS MATERIALS CO., LTD., Tokyo, JP;
DOWA IP CREATION CO., LTD., Okayama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/10 (2006.01); G03G 9/107 (2006.01); G03G 9/113 (2006.01); C01G 49/00 (2006.01);
U.S. Cl.
CPC ...
G03G 9/1075 (2013.01); C01G 49/0072 (2013.01); G03G 9/107 (2013.01); G03G 9/113 (2013.01); C01P 2006/40 (2013.01); C01P 2006/42 (2013.01); C01P 2006/90 (2013.01);
Abstract
A carrier core particle for an electrophotographic developer includes a composition expressed by a general formula: MnFeO(0<x≦1, 0<y), a full width at half maximum z of the most intense peak () plane in a powder X-ray diffraction pattern satisfying 0.16 (degree)≦z, and a magnetization of 50 emu/g or higher in an external magnetic field of 1000 Oe.