Patents by Inventor Kazunao Yokota

Kazunao Yokota 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 composition, formed products therefrom and segregation reduction agent for hydraulic substances
    Patent number: 5174821
    Abstract: This invention provides a hydraulic composition which contains a cementitious material in powder form, .beta.-1,3-glucan, and a superplasticizer. The composition makes it possible to prepare concrete with high resistance to segregation, high fluidity, and excellent filling ability. Because of this, vibration of the concrete is not necessary during casting; it can simply be poured.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: December 29, 1992
    Assignees: Taisei Corporation, Takeda Chemical Industries, Ltd.
    Inventors: Yasunori Matsuoka, Takefumi Shindoh, Kazunao Yokota, Takafumi Naito, Akira Haze, Kiyoshi Nara