Patents by Inventor Syoji Komura

Syoji Komura 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).

  • Production process of carbonaceous material and battery
    Patent number: 5910383
    Abstract: A process is provided for the production of a carbonaceous material. The process comprises the following steps: subjecting a vacuum distillation residual pitch to heat treatment until the content of quinoline-insoluble components thereof becomes 50 to 85 wt. %, whereby the pitch is converted into a mesophase pitch; grinding the thus-obtained mesophase pitch into fine particles having an aspect ratio not greater than 2; subjecting the thus-ground product to oxidation treatment; and subjecting the thus-oxidized product to carbonization or graphitization treatment. A lithium ion secondary battery comprises a negative pole made of the carbonaceous material.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: June 8, 1999
    Assignee: Adchemco Corporation
    Inventors: Yoshihiko Hase, Hidetoshi Morotomi, Hiromi Okamoto, Syoji Komura, Yasuyuki Takigawa, Shigeyuki Hirano, Tetsuo Shiode