Patents by Inventor Tetu Yasuoka

Tetu Yasuoka 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).

  • Method of constructing a continuous cut-off wall and a core of a fill-type dam
    Patent number: 4266885
    Abstract: The present invention relates to a method of constructing a continuous cut-off wall and a core of a fill-type dam in the ground by placing or grouting at a normal temperature a mixture of a cold-setting property comprising a cement, coarse and fine aggregates and a bituminous emulsion in a certain range of composition (hereinafter referred to as a cement bitumen concrete or a CA concrete), or a mixture of a cold-setting property comprising a cement, fine aggregate and a bituminous emulsion in a certain range of composition (hereinafter referred to as a cement bitumen mortar or a CA mortar) and further constructing an extended core of a fill-type dam above the continuous cut-off wall.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: May 12, 1981
    Assignees: Ohbayashi-Gumi Ltd., Nichireki Chemical Industry Co., Ltd.
    Inventors: Kazuaki Naito, Takaiki Tetekawa, Shigeyuki Sogo, Kazuhiko Higaki, Tetu Yasuoka, Hidetoshi Hosoi