Patents by Inventor Yukio Shibayama

Yukio Shibayama 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).

  • Hydraulic material composition having high strength
    Patent number: 4933013
    Abstract: This invention is directed to a hydraulic material composition having high strength. The composition contains a hydraulic material, an ultra-fine particle, a water reducing agent and water. The hydraulic material contains 0 to 16.5% by weight of an aluminate phase consisting essentially of 3CaO.Al.sub.2 O.sub.3 and 4CaO.Al.sub.2 O.sub.3.Fe.sub.2 O.sub.3.
    Type: Grant
    Filed: September 7, 1988
    Date of Patent: June 12, 1990
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Etsuo Sakai, Yukio Shibayama, Kazuhiro Kaizaki, Yasuhito Fushii