Patents Assigned to Ceramic Co., Ltd. Harima
  • 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