Patents by Inventor Ryokche Cho

Ryokche Cho 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).

  • Fiber-reinforced concrete and reinforcing material for concrete
    Patent number: 4565840
    Abstract: A fiber-reinforced concrete comprising two kinds of short fibers, one being a short fiber having a Young's modulus higher than that of concrete, the other being a short fiber which has a Young's modulus lower than that of concrete and showing good adhesiveness to concrete. The both fibers are mixed in a predetermined ratio and dispersed in a concrete matrix. A reinforcing material for concrete is also disclosed which material consisting of such fibers as mentioned above.
    Type: Grant
    Filed: June 11, 1984
    Date of Patent: January 21, 1986
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Kazusuke Kobayashi, Ryokche Cho