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:
Aug. 23, 2022
Filed:
Sep. 25, 2019
Applicant:
Nichia Corporation, Anan, JP;
Inventors:
Rieko Yoshimoto, Tokushima, JP;
Satoshi Yamanaka, Tokushima, JP;
Shuichi Tada, Anan, JP;
Hideaki Yoshiwara, Anan, JP;
Assignee:
NICHIA CORPORATION, Anan, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/055 (2006.01); B05D 3/14 (2006.01); B05D 7/24 (2006.01); H01F 1/059 (2006.01); C04B 41/00 (2006.01); C04B 41/52 (2006.01); C04B 41/89 (2006.01);
U.S. Cl.
CPC ...
H01F 1/0552 (2013.01); B05D 3/142 (2013.01); B05D 7/24 (2013.01); C04B 41/009 (2013.01); C04B 41/0054 (2013.01); C04B 41/52 (2013.01); C04B 41/89 (2013.01); H01F 1/059 (2013.01);
Abstract
Provided are a SmFeN magnetic powder which is superior not only in water resistance and corrosion resistance but also in hot water resistance, and a method of preparing the powder. The present invention relates to a method of preparing a magnetic powder, comprising: plasma-treating a gas; surface-treating a SmFeN magnetic powder with the plasma-treated gas; and forming a coat layer on the surface of the surface-treated SmFeN magnetic powder.