Invention Grant
- Patent Title: Light-colored magnetic particles having improved durability and chemical resistance
-
Application No.: US16958308Application Date: 2018-11-08
-
Publication No.: US11694827B2Publication Date: 2023-07-04
- Inventor: Hong Keon Kim , Won Gyun Choe , Su Dong Kim , Hyun Soo Kim , E Den Kim , Hye Jun Choi , Ju Hee Kang
- Applicant: KOREA MINTING, SECURITY PRINTING & ID CARD OPERATING CORP.
- Applicant Address: KR Daejeon
- Assignee: Korea Minting, Security Printing & ID Card Operating Corp.
- Current Assignee: Korea Minting, Security Printing & ID Card Operating Corp.
- Current Assignee Address: KR Daejeon
- Agency: The Webb Law Firm
- Priority: KR 20170183726 2017.12.29
- International Application: PCT/KR2018/013521 2018.11.08
- International Announcement: WO2019/132232A 2019.07.04
- Date entered country: 2020-06-26
- Main IPC: H01F1/047
- IPC: H01F1/047 ; B42D25/29 ; B42D25/369 ; C09D11/037 ; C22C38/16 ; C22C38/06 ; H01F1/09 ; B22F1/16 ; B22F1/145 ; B22F1/17 ; B22F1/052
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.
Information query
