Patents by Inventor Satoshi Doro

Satoshi Doro 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).

  • Refractory composition
    Patent number: 4780434
    Abstract: A refractory composition which is suitable for forming a sliding gate to be used at the bottom of a ladle or tundish is provided. The refractory composition comprises 10 to 30 parts by weight of an alumina-magnesia spinel material containing 40 to 70% by weight of Al.sub.2 O.sub.3, 25 to 60% by weight of MgO and 10% or less of impurities, and 70 to 90 parts by weight of a magnesia material containing at least 90% by weight of MgO, wherein the composition contains 10 to 25% by weight of Al.sub.2 O.sub.3 and 75 to 90% by weight of MgO. 1 to 10 parts by weight of Al.sub.2 O.sub.3 material may be further added together with the alumina-magnesia spinel material and the magnesia material, to form the refractory composition.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: October 25, 1988
    Assignee: Toshiba Ceramics, Co., Ltd.
    Inventors: Takashi Watanabe, Takumi Nishio, Yoshihisa Kato, Kazuhide Kawai, Satoshi Doro, Takafumi Nishibe, Takahiro Fukaya