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:
Oct. 21, 2014
Filed:
Mar. 29, 2011
Applicants:
Takeshi Kawauchi, Okayama, JP;
Sho Ogawa, 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 9/113 (2006.01); G03G 9/10 (2006.01); G03G 9/107 (2006.01);
U.S. Cl.
CPC ...
G03G 9/107 (2013.01); G03G 9/10 (2013.01); G03G 9/1075 (2013.01); G03G 9/1132 (2013.01);
Abstract
A carrier core particle for an electrophotographic developer includes a core composition expressed by a general formula: MnFeO(0<x≦1, 0<y) as a main ingredient, 0.1 wt % or more of Si, and 0.03 wt % or more of at least one metal element selected from the group consisting of Ca, Sr and Mg.