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:
May. 08, 2001
Filed:
Mar. 18, 1999
Kiyoshi Yokogawa, Kure, JP;
Seiji Fukuyama, Kure, JP;
Bai An, Kure, JP;
Masamichi Yoshimura, Nagoya, JP;
Isao Mochida, Fukuoka, JP;
Yozo Korai, Fukuoka, JP;
Minato Egashira, Saga-ken, JP;
Abstract
Disclosed is a novel structured body of carbon in the form of a particle having electric conductivity comparable with graphite, which has a frustum-formed protrusion formed from a top flat consisting of a single carbon pentagon and a lateral surface consisting of a plurality of carbon hexagons. The structured body of carbon is prepared by a two-stage heat treatment of a carbonaceous material having a carbon pentagon to form a crystalline structure, such as a fullerene compound, in a non-oxidizing atmosphere. The first stage heat treatment is conducted at 800 to 1200° C. to effect complete degradation of the crystalline structure of the starting material into an amorphous state and the second stage heat treatment is conducted at 1800 to 2500° C. to effect re-crystallization but not to cause graphitization.