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:
Jun. 24, 2025
Filed:
Apr. 08, 2020
Applicant:
Nittetsu Mining Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
NITTETSU MINING CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G 51/04 (2025.01); C09D 5/00 (2006.01); G03G 9/083 (2006.01); H01F 1/11 (2006.01);
U.S. Cl.
CPC ...
C01G 51/04 (2013.01); C09D 5/00 (2013.01); G03G 9/0833 (2013.01); G03G 9/0834 (2013.01); G03G 9/0837 (2013.01); G03G 9/0838 (2013.01); G03G 9/0839 (2013.01); H01F 1/11 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2006/42 (2013.01);
Abstract
Provided are magnetic particles (cobalt ferrite) having a micrometer-order average particle diameter and similar particle diameters. A cobalt ferrite precursor is heated in the presence of a sulfite, thereby obtaining intended cobalt ferrite magnetic particles.