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. 16, 2023
Filed:
Sep. 27, 2018
Applicant:
Powdertech Co., Ltd., Chiba, JP;
Inventors:
Takashi Kojima, Chiba, JP;
Kazutaka Ishii, Chiba, JP;
Takao Sugiura, Chiba, JP;
Tetsuya Igarashi, Chiba, JP;
Koji Aga, Chiba, JP;
Assignee:
POWDERTECH CO., LTD., Chiba, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/34 (2006.01); H01F 1/33 (2006.01); H01F 1/37 (2006.01); H01F 27/255 (2006.01); C01G 49/00 (2006.01); C30B 29/22 (2006.01);
U.S. Cl.
CPC ...
H01F 1/344 (2013.01); C01G 49/009 (2013.01); C01G 49/0072 (2013.01); C30B 29/22 (2013.01); H01F 1/33 (2013.01); H01F 1/37 (2013.01); C01P 2004/04 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2006/42 (2013.01); H01F 27/255 (2013.01); Y10T 428/32 (2015.01);
Abstract
Mn—Zn ferrite particles according to the present invention contain 44-60% by mass of Fe, 10-16% by mass of Mn and 1-11% by mass of Zn. The ferrite particles are single crystal bodies having an average particle diameter of 1-2,000 nm, and have polyhedral particle shapes, while having an average sphericity of 0.85 or more but less than 0.95.