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:
Mar. 14, 2023
Filed:
Mar. 23, 2021
Nippon Steel Chemical & Material Co., Ltd., Tokyo, JP;
Mazda Motor Corporation, Aki-gun, JP;
Toshiaki Miyanaga, Tokyo, JP;
Kazuhisa To, Aki-gun, JP;
Nobuyoshi Kajioka, Aki-gun, JP;
Junichi Ogawa, Aki-gun, JP;
Kenji Hiramoto, Aki-gun, JP;
Mazda Motor Corporation, Aki-Gun, JP;
Abstract
Provided is carbon material filler for an electromagnetic shield, which includes a graphitizable carbon material to be mixed into a molding material in order to absorb electromagnetic waves, the carbon material filler for an electromagnetic shield satisfying (1) to (3): (1) A spacing d002 of a 002 plane of the graphitizable carbon material measured through X-ray diffraction measurement (XRD) is at least 0.338 nm. (2) A relative intensity ratio (A/B) value between a peak intensity (A) of a '002 plane' detected when the graphitizable carbon material is measured through X-ray diffraction measurement (XRD) and a higher peak intensity (B) that is selected from a '100 plane' and a “004 plane” is at least 2.5 and less than 27. (3) The filler is in powder form and the average particle diameter D50 is at least 1 μm and at most 5 mm.