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. 14, 2022
Filed:
May. 29, 2018
Applicants:
Shusuke Okada, Aichi, JP;
Kenta Takagi, Aichi, JP;
Yasushi Enokido, Tokyo, JP;
Yoshinori Fujikawa, Tokyo, JP;
Ryuji Hashimoto, Tokyo, JP;
Inventors:
Shusuke Okada, Aichi, JP;
Kenta Takagi, Aichi, JP;
Yasushi Enokido, Tokyo, JP;
Yoshinori Fujikawa, Tokyo, JP;
Ryuji Hashimoto, Tokyo, JP;
Assignees:
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 1/059 (2006.01); B22F 9/20 (2006.01); B22F 1/05 (2022.01); B22F 1/145 (2022.01);
U.S. Cl.
CPC ...
H01F 1/059 (2013.01); B22F 1/05 (2022.01); B22F 1/145 (2022.01); B22F 9/20 (2013.01);
Abstract
One embodiment of the present invention is that in samarium-iron-nitrogen magnet powder, a non-magnetic phase is formed on a surface of the samarium-iron-nitrogen magnet phase, and an arithmetic mean roughness Ra of the surface is 3.5 nm or less.