Patents by Inventor Shiyoichiro Yokoyama

Shiyoichiro Yokoyama 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 for refining sugar solutions
    Patent number: 4362571
    Abstract: Disclosed is a method for refining sugar solutions with magnesia wherein magnesia used for refining of a sugar solution is calcined together with pearlite and/or diatomaceous earth at least in an amount of the same weight as that of the magnesia and the resulting calcined mixture is used for refining of the sugar solution again.
    Type: Grant
    Filed: May 27, 1981
    Date of Patent: December 7, 1982
    Assignees: Agency of Industrial Science & Technology, Sumitomo Jukikai Envirotech, Inc., Hokkaido Soda Co., Ltd., Mitsui Sugar Co., Ltd.
    Inventors: Yoshikatsu Ikari, Shiyoichiro Yokoyama, Keisuke Katoh, Ryutaro Itaya, Toshio Kaga
  • Method for treatment of waste water
    Patent number: 4163715
    Abstract: In removing color components and COD components from waste water, the waste water is treated with an inorganic adsorbent, the mixture thus obtained is subjected to a sedimentation treatment to separate the adsorbent adsorbed the color and COD components as a slurry layer, and a portion of the adsorbent slurry is returned to the adsorption step and the remainder thereof is subjected to a regenerating treatment to recycle as an adsorbent.Pollution-free water is effectively obtained by the above method.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: August 7, 1979
    Assignees: Agency of Industrial Science & Technology, Sumitomo Jukikai Envirotech, Inc.
    Inventors: Yoshikatsu Ikari, Shiyoichiro Yokoyama, Keisuke Katoh