Patents by Inventor Teturo Kunisawa

Teturo Kunisawa 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 producing sialon powders
    Patent number: 4812298
    Abstract: Uniform sialon powders having a sharp particle size distribution are obtained by mixing (i) amorphous silicon nitride powders, (ii) an oxygen-containing compound of silicon or/and aluminum, and (iii) aluminum metal, aluminum nitride and/or silicon, and then heating the resultant mixture at 1300.degree. to 1800.degree. C. in an atmosphere containing nitrogen.
    Type: Grant
    Filed: September 23, 1986
    Date of Patent: March 14, 1989
    Assignee: Ube Industries, Ltd.
    Inventors: Yasuhiko Kohtoku, Teturo Kunisawa, Takuji Takahashi