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. 13, 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:
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22F 3/16 (2006.01); B22F 3/24 (2006.01); B22F 9/04 (2006.01); C22C 28/00 (2006.01); H01F 1/057 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
B22F 3/16 (2013.01); B22F 3/24 (2013.01); B22F 9/04 (2013.01); C22C 28/00 (2013.01); H01F 1/0571 (2013.01); H01F 41/0266 (2013.01); B22F 2003/248 (2013.01); B22F 2009/044 (2013.01); B22F 2202/05 (2013.01); B22F 2301/45 (2013.01); C22C 2202/02 (2013.01);
Abstract
There is provided a method for manufacturing a rare earth sintered magnet by many times repetitively finely pulverizing a rare earth alloy on a jet mill by supplying high-pressure nitrogen gas to narrow grain size distribution to make an easy alignment in a magnetic field, and by micronizing crystal grains by using a hydrogenation-disproportionation-desorption-recombination (HDDR) process, to improve the coercivity and thermostability of the rare earth sintered magnet.
Kim, Dong. (2024). Method for manufacturing rare earth permanent magnet (U.S. Patent No. 11897034). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11897034
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile