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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 3944445 B1

PDFFull Text
Date of Patent:
Mar. 16, 1976

Filed:

Oct. 08, 1974

Method of making permanent magnets of mn-al-c alloy

Applicant:
Inventors:

Tadoa Ohtani, Katano, JA;

Nobuyuki Kato, Katano, JA;

Shigeru Kojima, Kyoto, JA;

Yoichi Sakamoto, Hirakata, JA;

Masaharu Tsukahara, Neyagawa, JA;

Kiyoshi Kojima, Hirakata, JA;

Isago Konno, Neyagawa, JA;

Takao Kubo, Kawachinagano, JA;

Assignee:

Matsushita Electric Industrial Co., Ltd., , JA;

Attorney:

Wenderoth, Lind & Ponack

Primary Examiner:

Walter R Satterfield

Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
148121 ; 148 3155 ; 148120 ; 7513 / ;
Abstract

A method of making isotropic Mn-Al-C alloy magnets which comprises the step of subjecting an alloy comprising 71.0% to 73.0% by weight of manganese, (1/10 Mn -- 6.6)% to (1/3 Mn -- 22.2)% by weight of carbon and the remainder aluminum to plastic deformation at a temperature of 550.degree.C to 780.degree.C. By utilizing this method, it is possible to obtain isotropic Mn-Al-C alloy magnets having excellent magnetic characteristics, i.e. (BH)max = 2.0 .times. 10.sup.6 G. Oe or more.

Find Patent Forward Citations

Ohtani, Tadoa. (1976). Method of making permanent magnets of mn-al-c alloy (U.S. Patent No. 3944445). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3944445

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