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:
Sep. 30, 2025
Filed:
Feb. 01, 2021
Applicant:
Hokuetsu Corporation, Nagaoka, JP;
Inventors:
Assignee:
HOKUETSU CORPORATION, Nagaoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L 1/28 (2006.01); C08J 3/21 (2006.01); C08K 3/04 (2006.01); C08K 3/34 (2006.01); H05K 9/00 (2006.01);
U.S. Cl.
CPC ...
C08L 1/286 (2013.01); C08J 3/212 (2013.01); C08K 3/041 (2017.05); C08K 3/346 (2013.01); H05K 9/009 (2013.01); C08J 2301/28 (2013.01); C08K 2201/014 (2013.01);
Abstract
A method of producing an electromagnetic wave shielding sheet by which an electromagnetic wave shielding sheet having a high shielding property against an electromagnetic wave and having low cost is produced. The method of producing an electromagnetic wave shielding sheet includes; preparing a dispersion containing carbon nanotubes, an inorganic pigment, sodium carboxymethyl cellulose, and water; and drying the dispersion. In the dispersion, a ratio of a mass of the inorganic pigment to a mass of the carbon nanotubes is 1/4 or more and 1 or less.