Patents by Inventor Tatsuo Naritomi

Tatsuo Naritomi 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).

  • Patent number: 5290015
    Abstract: A method and apparatus for producing a high-melting-point and high-toughness metal, comprising: reducing a high-melting point and high-toughness metal chloride with an activated metal to form a high-melting-point and high-toughness sponge metal in a reducing vessel arranged sideways relative to a condensing vessel, wherein the condensing vessel is integrally connected to the reducing vessel through a conduit, and at least one of the reducing vessel and/or the condensing vessel is supported so as to move with thermal expansion of said conduit; and measuring a weight-change of the vessel supported so as to move with thermal expansion of the conduit to estimate the degree of progress of a separating and recovering process on the basis of the detected weight-change when nonreacted activated metal and its chloride remaining in the sponge metal formed in the reducing vessel are recovered into the condensing vessel by vacuum separation.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: March 1, 1994
    Assignees: Sumitomo Sitix Co., Ltd., Chugai Ro Co., Ltd.
    Inventors: Tatsuo Naritomi, Yoshinobu Toshida, Toshiyuki Ohta, Masaji Katsumaru, Hisayuki Wada, Takashi Banno, Tadayuki Choshi