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:
Jul. 10, 2018
Filed:
Jan. 22, 2014
Applicants:
Nisshin Seifun Group Inc., Tokyo, JP;
Nisshin Engineering Inc., Tokyo, JP;
Inventors:
Assignees:
NISSHIN SEIFUN GROUP INC., Tokyo, JP;
NISSHIN ENGINEERING INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 5/00 (2006.01); H01F 27/255 (2006.01); B22F 1/02 (2006.01); C22C 38/00 (2006.01); H01F 1/06 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
H01F 27/255 (2013.01); B22F 1/02 (2013.01); C22C 38/00 (2013.01); H01F 1/061 (2013.01); H01F 5/00 (2013.01); H01F 41/0206 (2013.01); H01F 41/0246 (2013.01); C22C 2202/02 (2013.01);
Abstract
This method for producing magnetic particles comprises a nitriding treatment step for applying a nitriding treatment to material particles each having a core-shell structure in which an aluminum oxide layer is formed on the surface of an iron microparticle, and nitriding the iron microparticles while maintaining the core-shell structure.