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:
Jul. 04, 2023
Filed:
Nov. 08, 2018
Applicant:
Korea Minting, Security Printing & ID Card Operating Corp., Daejeon, KR;
Inventors:
Hong Keon Kim, Daejeon, KR;
Won Gyun Choe, Daejeon, KR;
Su Dong Kim, Daejeon, KR;
Hyun Soo Kim, Daejeon, KR;
E Den Kim, Gwangju, KR;
Hye Jun Choi, Daejeon, KR;
Ju Hee Kang, Daejeon, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/047 (2006.01); B42D 25/29 (2014.01); B42D 25/369 (2014.01); C09D 11/037 (2014.01); C22C 38/16 (2006.01); C22C 38/06 (2006.01); H01F 1/09 (2006.01); B22F 1/16 (2022.01); B22F 1/145 (2022.01); B22F 1/17 (2022.01); B22F 1/052 (2022.01);
U.S. Cl.
CPC ...
H01F 1/09 (2013.01); B22F 1/052 (2022.01); B22F 1/147 (2022.01); B22F 1/16 (2022.01); B22F 1/17 (2022.01); B42D 25/29 (2014.10); B42D 25/369 (2014.10); C09D 11/037 (2013.01); H01F 1/047 (2013.01);
Abstract
The present invention can provide light-colored magnetic particles having a zirconium oxide coating layer formed on a magnetic core, and having a silver coating layer formed on the zirconium oxide coating layer, and a part of the surface of the zirconium oxide coating layer is exposed to the outside, but chemical resistance is excellent, and thus the magnetic particles hardly cause a change of magnetic characteristics so as to be suitable for security elements.