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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.:

US 10128031 B1

PDFFull Text
Date of Patent:
Nov. 13, 2018

Filed:

Jan. 20, 2015

Method for manufacturing magnetic particles from a silicon oxide-iron core-shell structure

Applicants:

Nisshin Seifun Group Inc., Tokyo, JP;

Nisshin Engineering Inc., Tokyo, JP;

Inventors:

Keitaroh Nakamura, Fujimino, JP;

Akihiro Kinoshita, Fujimino, JP;

Naohito Uemura, Fujimino, JP;

Assignees:

NISSHIN SEIFUN GROUP INC., Tokyo, JP;

NISSHIN ENGINEERING INC., Tokyo, JP;

Attorney:

Muncy, Geissler, Olds & Lowe, P.C.

Primary Examiner:

Hoa (Holly) Le

Int. Cl.
CPC ...
B22F 1/02 (2006.01); B22F 9/20 (2006.01); H01F 7/02 (2006.01); B22F 1/00 (2006.01); B22F 7/06 (2006.01); C22C 33/02 (2006.01); H01F 1/06 (2006.01);
U.S. Cl.
CPC ...
H01F 7/02 (2013.01); B22F 1/0018 (2013.01); B22F 1/0048 (2013.01); B22F 1/0088 (2013.01); B22F 1/02 (2013.01); B22F 7/062 (2013.01); C22C 33/02 (2013.01); H01F 1/061 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); C22C 2202/02 (2013.01);
Abstract

Provided is a method for manufacturing magnetic particles, in which an oxidation treatment, a reduction treatment, and a nitriding treatment are performed in that order on raw material particles with a core-shell structure in which a silicon oxide layer is formed on the surfaces of iron microparticles, thereby nitriding the iron microparticles while maintaining the core-shell structure. Due to this configuration, granular magnetic particles with a core-shell structure in which a silicon oxide layer is formed on the surfaces of iron nitride microparticles can be obtained.

Find Patent Forward Citations

Nakamura, Keitaroh. (2018). Method for manufacturing magnetic particles from a silicon oxide-iron core-shell structure (U.S. Patent No. 10128031). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10128031

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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