Patents by Inventor Katsuhisa Ohsaki

Katsuhisa Ohsaki 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 the production of aluminum nitride-based sintered products
    Patent number: 5167944
    Abstract: An aluminum nitride-based sintered product can be produced at a relatively low heating temperature by mixing at least 20% by weight of ultrafine aluminum powder having an average size of not exceeding 0.5 .mu.m with other powdery raw material, compression molding the resultant powdery mixture, and heating the molded article under a nitrogen atmosphere at a heating temperature ranging from 600.degree. to 800.degree. C. to nitride the ultrafine aluminum powder, whereupon the heat of nitridation is utilized to sinter the molded article.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: December 1, 1992
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Masahiro Uda, Katsuhisa Ohsaki, Yoshikazu Morita