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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 12753473 B1

PDFFull Text
Date of Patent:
Oct. 06, 2026

Filed:

Oct. 24, 2022

Soft magnetic alloy powder and production method therefor

Applicant:

Mitsubishi Steel Mfg. Co., Ltd., Tokyo, JP;

Inventors:

Tetsuji Shiseki, Fukushima, JP;

Michitaka Aihara, Fukushima, JP;

Keita Kume, Fukushima, JP;

Seiichi Saito, Ichihara, JP;

Assignee:

MITSUBISHI STEEL MFG. CO., LTD., Tokyo, JP;

Attorney:

Carlson, Gaskey & Olds, P.C.

Primary Examiner:

Jophy S Koshy

Int. Cl.
CPC ...
C22C 38/34 (2006.01); B22F 1/00 (2022.01); B22F 1/16 (2022.01); B22F 9/08 (2006.01); C22C 1/04 (2023.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); H01F 1/147 (2006.01); H01F 1/20 (2006.01); H01F 1/33 (2006.01);
U.S. Cl.
CPC ...
C22C 38/34 (2013.01); B22F 1/00 (2013.01); B22F 1/09 (2022.01); B22F 1/16 (2022.01); B22F 9/08 (2013.01); B22F 9/082 (2013.01); C22C 1/04 (2013.01); C22C 33/02 (2013.01); C22C 33/0264 (2013.01); C22C 38/002 (2013.01); C22C 38/04 (2013.01); H01F 1/147 (2013.01); H01F 1/14766 (2013.01); H01F 1/14791 (2013.01); H01F 1/20 (2013.01); B22F 2009/0848 (2013.01); B22F 2207/01 (2013.01); C22C 33/0278 (2013.01); C22C 2202/02 (2013.01); H01F 1/33 (2013.01);
Abstract

An Fe—Cr—Si-based soft magnetic alloy powder is provided in which the Cr weight ratio of Cr contained in the alloy powder gradually decreases from the surface of the alloy powder to a predetermined depth in the depth direction, the amount contained of Si is in the range of 3 to 6.5% by weight, the amount contained of Cr may be in the range of 1 to 5% by weight, at least one of Mn, P, S, and O may be further contained, the weight ratio of Cr oxide/metal Cr may gradually decrease from the surface of the alloy powder in the depth direction, and loss in the soft magnetic alloy powder used in a dust core is reduced so as to be able to cope with higher frequencies and larger currents.

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Shiseki, Tetsuji. (2026). Soft magnetic alloy powder and production method therefor (U.S. Patent No. 12753473). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12753473

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

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