Patents by Inventor Hisato Okamoto

Hisato Okamoto 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).

  • Chrome-free brick
    Patent number: 5559064
    Abstract: Chrome-free bricks which exhibit excellent resistance to corrosion, penetration, and thermal spalling. The bricks are mainly made from a magnesia material and/or a magnesia-alumina spinel material and comprise 1 to 10 wt % titania and 1 to 15 wt % alumina. They may contain 0.5 to 10 wt % iron oxide. Further, they may contain at least one material of the group consisting of 1 to 10 wt % metal powder, 1 to 20 wt % carbon and 1 to 20 wt % one of oxide materials except for iron oxide.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: September 24, 1996
    Assignee: Harima Ceramic Co., Ltd.
    Inventors: Akihiro Tsuchinari, Hiroaki Osaki, Hisato Okamoto, Tetsuo Yamamoto