Patents by Inventor Nobuyuki Oonishi

Nobuyuki Oonishi 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).

  • Process for producing carbon fiber reinforced carbon composite material, carbon fiber reinforced carbon composite material and sliding material
    Patent number: 5525558
    Abstract: A process for producing a carbon fiber reinforced carbon composite material, comprising dispersing a short fibrous bundle of carbon fibers which comprises a plurality of single fibers, preparing a sheet in which fibers are in the two-dimensional random orientation, impregnating with a resin or pitch, laminating and molding, and then applying a baking and densifying treatment, a dispersion degree of the bundle of carbon fibers being controlled based on the formula (1) expressing correlation between the dispersion degree of the bundle of carbon fibers and the mechanical strength of the carbon fiber reinforced composite material:Dispersion degree=A-B.times.coefficient of friction (1)wherein A and B are constants determined experimentally, to produce a carbon fiber reinforced carbon composite material having desired mechanical characteristic.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: June 11, 1996
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kazuo Niwa, Toshihiro Fukagawa, Nobuyuki Oonishi, Takeo Matsui, Yutaka Kawamata, Hitoshi Seki