Patents by Inventor Fujio Ohishi

Fujio Ohishi 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).

  • Resilient coat for tie of direct-connection type track
    Patent number: 4652495
    Abstract: A resilient coat for a direct connection-type tie (Danchoku tie) which is composed of a concrete tie body and a microcellular polyurethane elastomer coating layer which adheres to and coats the lower portion of the tie body to form an integral body therewith, and said microcellular polyurethane elastomer having urethane bonds and a bulk density of 0.4-0.75 g/cm.sup.3 and being prepared from the starting foamable liquid of urethane elastomer composed substantially of (a) a polyether polyol having an average number of functional groups of 2.5-4.5 and a number average molecular weight of 2000-8500, (b) a vinyl monomer-grafted polyol having an average number of functional groups of 2.5-4.0, and the graft ratio of 4-20% by weight, (c) a liquid polybutadiene polyol having hydroxyl terminal group(s), an average number of functional groups of 2.0-3.
    Type: Grant
    Filed: January 31, 1986
    Date of Patent: March 24, 1987
    Assignees: Japanese National Railways, Nisshinbo Industries, Inc.
    Inventors: Yoshihiko Sato, Fujio Ohishi, Tatsuya Hongu, Toshio Suzuki, Yoshihiko Ogawa