Patents by Inventor Shyoichi Kume

Shyoichi Kume 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 manufacture of high-strength sintered article of substances having .beta.-silicon nitride type crystal structure
    Patent number: 4365022
    Abstract: A high-strength sintered article of chemical substances having the .beta.-silicon nitride type crystal structure is produced by blending 50 to 99.9 weight percent of a .beta.-silicon nitride and/or .beta.'-Sialon and 50 to 0.1 weight percent of a mixture, as a sintering aid, consisting of BeO, Ga.sub.2 O.sub.3, and Al.sub.2 O.sub.3 in respective amounts such as to have a Ga.sub.2 O.sub.3 /BeO ratio in the range of from 2.8 to 9.4, an Al.sub.2 O.sub.3 /BeO ratio in the range of from 0.0 to 2.6, and an Al.sub.2 O.sub.3 /Ga.sub.2 O.sub.3 ratio in the range of from 0.0 to 1.1, all ratios being ratios by weight and sintering the resultant blend.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: December 21, 1982
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Hideyo Tabata, Yoshitaka Kuwahara, Michihide Machida, Shyoichi Kume, Takeo Iga, Kazuo Saitoh, Shinji Tomura