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:
Nov. 04, 2025
Filed:
Dec. 27, 2022
Applicant:
Nichia Corporation, Anan, JP;
Inventors:
Masahiro Abe, Tokushima, JP;
Satoshi Yamanaka, Tokushima, JP;
Shuichi Tada, Komatsushima, JP;
Kenta Iwai, Anan, JP;
Assignee:
NICHIA CORPORATION, Anan, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/059 (2006.01); B22F 1/142 (2022.01); B22F 1/145 (2022.01); B22F 1/16 (2022.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/059 (2013.01); B22F 1/142 (2022.01); B22F 1/145 (2022.01); B22F 1/16 (2022.01); H01F 41/026 (2013.01); B22F 2201/03 (2013.01); B22F 2301/45 (2013.01); B22F 2302/45 (2013.01); B22F 2998/10 (2013.01);
Abstract
A method of producing a phosphate-coated SmFeN-based anisotropic magnetic powder, the method including performing a phosphate treatment including adding an inorganic acid to a slurry containing a raw material SmFeN-based anisotropic magnetic powder, water, a phosphate compound, and a rare earth compound so that the slurry is adjusted to have a pH of at least 1 and not higher than 4.5 to obtain a phosphate-coated SmFeN-based anisotropic magnetic powder having a surface coated with a phosphate.