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:
Dec. 06, 2022
Filed:
Sep. 27, 2017
Applicant:
Sony Corporation, Tokyo, JP;
Inventors:
Atsushi Muramatsu, Miyagi, JP;
Masafumi Nakaya, Miyagi, JP;
Masaru Terakawa, Miyagi, JP;
Satoru Abe, Miyagi, JP;
Natsuki Toyosawa, Miyagi, JP;
Katsunori Maeshima, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/714 (2006.01); C01G 49/06 (2006.01); G11B 5/65 (2006.01); G11B 5/842 (2006.01); H01F 1/00 (2006.01); H01F 1/06 (2006.01); H01F 1/11 (2006.01); G11B 5/712 (2006.01); G11B 5/706 (2006.01); B82Y 25/00 (2011.01); B82Y 40/00 (2011.01);
U.S. Cl.
CPC ...
G11B 5/714 (2013.01); C01G 49/06 (2013.01); G11B 5/653 (2013.01); G11B 5/70642 (2013.01); G11B 5/712 (2013.01); G11B 5/842 (2013.01); H01F 1/0045 (2013.01); H01F 1/06 (2013.01); H01F 1/11 (2013.01); H01F 1/112 (2013.01); B82Y 25/00 (2013.01); B82Y 40/00 (2013.01); C01P 2004/64 (2013.01); C01P 2004/84 (2013.01); C01P 2006/42 (2013.01);
Abstract
A method of producing a magnetic powder includes: performing heat treatment on first particles that contain triiron tetraoxide to prepare second particles that contain ε-iron oxide.