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:
Nov. 08, 2022
Filed:
Aug. 14, 2019
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Ikjin Choi, Daejeon, KR;
Soon Jae Kwon, Daejeon, KR;
Ingyu Kim, Daejeon, KR;
Hyounsoo Uh, Daejeon, KR;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
B22F 9/20 (2006.01); B22F 1/02 (2006.01); B22F 9/04 (2006.01); H01F 1/057 (2006.01); C22C 38/00 (2006.01); B22F 1/16 (2022.01);
U.S. Cl.
CPC ...
B22F 9/20 (2013.01); B22F 1/16 (2022.01); B22F 9/04 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); H01F 1/0577 (2013.01);
Abstract
A method of preparing magnetic powder includes preparing iron powder by a reduction reaction of iron oxide; preparing magnetic powder by heat-treating a molded article prepared by pressure-molding a mixture containing the iron powder, neodymium oxide, boron and calcium at a pressure of 22 MPa or more; and coating an organic fluoride on a surface of the magnetic powder.