Patents by Inventor Yasuyoshi Torii

Yasuyoshi Torii 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 production of metal-based composites with oxide particle dispersion
    Patent number: 5723799
    Abstract: The present invention provides metal-based composite with oxide particle dispersion and a method for producing the same.The present invention relates to a method for producing metal-based composite with oxide particle dispersion, comprising sintering of metal-based ultrafine powders (with an average grain size of about 20 nm to 100 nm and a grain size distribution of about 5 nm to 300 nm and with the surface oxidized for handling) in vacuum, in an inert gas or in a reducing atmosphere by rapid sintering, crystallizing the ultrafine powders with a grain size of about 50 nm or less to metal oxide during sintering and simultaneously removing the oxygen on the surface of the ultrafine powders with the grain size of about 50 nm or more, and the metal-based composite with oxide particle dispersion produced according to the said method.
    Type: Grant
    Filed: July 5, 1996
    Date of Patent: March 3, 1998
    Assignee: Director General of Agency of Industrial Science and Technology
    Inventors: Norimitsu Murayama, Yasuyoshi Torii
  • Method for manufacture of photo-semiconductor
    Patent number: 4678732
    Abstract: A photo-semiconductor is produced by melting Bi.sub.2 O.sub.3 or its mixture with a small amount of an oxide or fluoride and then quenching the resultant melt in the form of a film.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: July 7, 1987
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Tadashi Sekiya, Akihiro Tsuzuki, Yasuyoshi Torii