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, 2000
Filed:
Aug. 25, 1998
Applicant:
Inventors:
Shinichi Kitahata, Toride, JP;
Keiko Kurata, Tsukuba, JP;
Yoshio Nikawa, Yokohama-shi, JP;
Masaru Chino, Yokosuka, JP;
Assignees:
Hitachi Maxell, Ltd, Osaka, JP;
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
524495 ; 524496 ;
Abstract
The present invention relates to a lightweight and flexible material for prevention of electric waves having both absorbing properties and shielding properties against electric waves. In the present invention, carbon fiber or magnetic particles, or both and graphitized carbon black are dispersed and incorporated into an insulating substrate so that the weight ratio of the graphitized carbon black to the carbon fiber, the magnetic particles or the sum of the two may be 0.3 to 5.