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:
Sep. 02, 2025
Filed:
Jun. 10, 2022
Applicant:
Nichia Corporation, Anan, JP;
Inventor:
Hisashi Maehara, Itano-gun, JP;
Assignee:
NICHIA CORPORATION, Anan, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/059 (2006.01); B22F 9/04 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/059 (2013.01); C22C 33/0235 (2013.01); C22C 38/001 (2013.01); C22C 38/005 (2013.01); C22C 2202/02 (2013.01);
Abstract
A method of producing a SmFeN-based anisotropic magnetic powder is provided, the method including preparing a SmFeN-based anisotropic magnetic powder before dispersing comprising Sm, Fe, W, and N, and dispersing the SmFeN-based anisotropic magnetic powder before dispersing using a resin-coated metal media or a resin-coated ceramic media to obtain a SmFeN-based anisotropic magnetic powder. Also provided is a SmFeN-based anisotropic magnetic powder comprising Sm, Fe, W, and N and having an average particle size of less than 2.5 μm, a residual magnetization σr of not less than 130 emu/g, and an oxygen content of not higher than 0.75% by mass.