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:
Dec. 02, 1986
Filed:
May. 03, 1985
Michio Takaoka, Chiba, JP;
Tsuneaki Motai, Yachiyo, JP;
Motoyuki Ono, Sakura, JP;
Shotaro Yoshida, Tokyo, JP;
Toshio Niwa, Yachiyo, JP;
Toru Takahashi, Tokyo, JP;
Keiichiro Kataoka, Ichikawa, JP;
Hiroshi Yamanouchi, Tokyo, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
A DC power cable includes a conductor and an insulation of a thermoplastic resin formed around the conductor. The insulation contains carbon black in an amount of about 0.2 to about 5% of the total weight of the thermoplastic resin and the carbon black, and the ratio of mineral oil absorption (cc/100 g) to specific surface (m.sup.2 /g) in the carbon black is not less than 0.7. The carbon black has the hydrogen content of not more than 0.6% by weight. The specific surface is measured by BET equation. The carbon black has a particle size of 10 to 100 nm.