Patents by Inventor Kohzo Sakai

Kohzo Sakai 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).

  • High zirconia fused refractory product
    Patent number: 4705763
    Abstract: A high zirconia fused refractory product consisting essentially of the following constituents analytically, on a weight basis:85 to 97% of ZrO.sub.2 ;0.05 to 3% of P.sub.2 O.sub.5 ;2 to 10% of SiO.sub.2 ;0.05 to 5% of B.sub.2 O.sub.3 ; andthe content of alkali metal oxides being less than 0.1%.
    Type: Grant
    Filed: August 21, 1986
    Date of Patent: November 10, 1987
    Assignee: Asahi Glass Company Ltd.
    Inventors: Atsushi Hayashi, Kiyoharu Kuwabara, Kohzo Sakai, Toshihiro Ishino
  • Removing rutile from zircon electrostatically
    Patent number: 4131539
    Abstract: Titanium dioxide component is removed from a mineral containing titanium dioxide component which is difficult to be separated by the conventional electrostatic separation.In the electrostatic separation from the mineral containing titanium dioxide component, the mineral is pretreated by a heat-treatment in an atmosphere of reducing, neutral or inert gas or a mixture thereof so as to change the electrostatic property of titanium dioxide and separating by an electrostatic separation.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: December 26, 1978
    Assignee: Asahi Glass Company Limited
    Inventors: Kozo Ojiri, Kohzo Sakai