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:
Feb. 27, 2024
Filed:
Sep. 13, 2018
Applicant:
Star Group Ind. Co., Ltd, Daegu, KR;
Inventors:
Dong Hwan Kim, Daegu, KR;
Koon Seung Kong, Daegu, KR;
Assignee:
STAR GROUP IND. CO., LTD, Daegu, KR;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 41/02 (2006.01); B22F 3/16 (2006.01); B22F 3/24 (2006.01); B22F 9/04 (2006.01); C22C 38/00 (2006.01); H02K 1/02 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0293 (2013.01); B22F 3/16 (2013.01); B22F 3/24 (2013.01); B22F 9/04 (2013.01); C22C 38/005 (2013.01); B22F 2003/248 (2013.01); B22F 2009/044 (2013.01); B22F 2201/10 (2013.01); B22F 2201/20 (2013.01); B22F 2202/05 (2013.01); B22F 2301/355 (2013.01); B22F 2304/10 (2013.01); C22C 2202/02 (2013.01); H02K 1/02 (2013.01);
Abstract
There is provided a method for manufacturing a rare earth sintered magnet having a stable magnetic performance, by uniformly distributing a heavy rear earth element to the surface of the magnet and the grain boundary inside of the magnet by using a mixture of a heavy rare earth compound or a heavy rare earth metal alloy and a rare earth magnet powder, to lower a decrease rate of the magnetic characteristics based on the temperature of the rare earth sintered magnet.