Patents by Inventor Minato Egashira

Minato Egashira has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Structured body of carbon having frustum protrusion and method for the preparation thereof
    Patent number: 6228498
    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.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: May 8, 2001
    Assignee: Japan as Represented by Director General of Agency of Industrial Science and Technology
    Inventors: Kiyoshi Yokogawa, Seiji Fukuyama, Bai An, Masamichi Yoshimura, Isao Mochida, Yozo Korai, Minato Egashira