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.

Date of Patent:
Apr. 14, 2026

Filed:

Dec. 07, 2021
Applicant:

3m Innovative Properties Company, St. Paul, MN (US);

Inventors:

Adam D. Miller, Vadnais Heights, MN (US);

Sergei A. Manuilov, Bayport, MN (US);

Michael S. Graff, Woodbury, MN (US);

Dipankar Ghosh, Oakdale, MN (US);

Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H05K 9/00 (2006.01); C08K 9/02 (2006.01); C09C 1/00 (2006.01);
U.S. Cl.
CPC ...
H05K 9/0083 (2013.01); C08K 9/02 (2013.01); C09C 1/0078 (2013.01); C01P 2004/20 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); C01P 2006/42 (2013.01); C08K 2201/01 (2013.01);
Abstract

A composite comprising a polymeric matrix and EM absorbers dispersed within the polymeric matrix. Each EM absorber comprises a dielectric flake, and a continuous magnetic coating on at least one major surface of the dielectric flake. The EM absorbers function as dielectric and magnetic absorbers in the 1-100 GHz frequency range. The composite can be used as an electromagnetic shielding article to mitigate electromagnetic interference in, for example, high speed, high frequency (HSHF) consumer electronics.


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