Patents by Inventor Takenao Hisamoto

Takenao Hisamoto 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).

  • Magnesia-alumina type spinel clinker and method of producing refractory by using same
    Patent number: 5171724
    Abstract: A magnesia-alumina type spinel clinker contains Fe.sub.2 O.sub.3 and TiO.sub.2 at boundaries between crystal grains, and a refractory produced by using the clinker has excellent corrosion resistance and cement coating properties. The refractory can thus be applied to the fields of cement rotary kiln refractories, refractories for iron making, steel making and nonferrous refining and the like.
    Type: Grant
    Filed: June 4, 1991
    Date of Patent: December 15, 1992
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Hitoshi Iwadoh, Takenao Hisamoto, Yoshio Yasuda, Katsunori Itoh, Mitsuteru Takemoto