Patents by Inventor Toshiaki Osaka

Toshiaki Osaka 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).

  • Process for producing a translucent .beta.-sialon sintered product
    Patent number: 4438051
    Abstract: A process for producing a translucent .beta.-sialon sintered product, which comprises mixing fine powders of silicon nitride and aluminum nitride having a high purity of at least 99% and a particle size of at most 200 microns and fine powders of aluminum oxide and silicon oxide having a high purity of at least 99% in such a proportion as to form .beta.-sialon of the formula Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z where z is from 1 to 4.2, and hot-pressing the mixture in a nitrogen atmosphere at a temperature of from 1500.degree. to 1850.degree. C. under pressure of from 10 to 1500 kg/cm.sup.2.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: March 20, 1984
    Assignee: National Institute for Researches in Inorganic Materials
    Inventors: Mamoru Mitomo, Yusuke Moriyoshi, Toshikazu Sakai, Toshiaki Osaka