Patents by Inventor Hitoshi Nishiwaki

Hitoshi Nishiwaki 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).

  • Refractories for casting process
    Patent number: 5283215
    Abstract: The present invention relates to a refractory for casting process composed mainly of 0.3 to 10 wt % light burned magnesia, 3 to 30 wt % micro fine calcined alumina, and the remainder of either sintered alumina, fused alumina and MgO-Al.sub.2 O.sub.3 spinel or sintered alumina and MgO-Al.sub.2 O.sub.3 spinel or fused alumina and MgO-Al.sub.2 O.sub.3 spinel.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: February 1, 1994
    Assignees: Ceramic Co., Ltd. Harima, Nippon Steel Corporation
    Inventors: Kiyoshiro Hosokawa, Hitoshi Nishiwaki, Kouichi Nishi, Seiji Hanagiri, Shiro Sukenari, Takenori Nakamichi, Naoki Tsutsui, Tsuyoshi Matsuda, Kouzou Akao