Patents by Inventor Haruyoshi Koga

Haruyoshi Koga 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).

  • Repairing mortars for silicon carbide bricks
    Patent number: 4249947
    Abstract: In structures of silicon carbide brick the leakage of molten metal or vaporous metal through breaks in joints or a crack is prevented by hot applying mortar comprising a major component of zircon and a minor component of borates or boric acid, phosphoric acid and colloidal silica to the breakages. Adhesiveness of mortar to the breakages is improved by incorporating further agalmatolite or kaolin into the mortar.
    Type: Grant
    Filed: July 27, 1979
    Date of Patent: February 10, 1981
    Assignee: Hachinohe Smelting Co., Ltd.
    Inventor: Haruyoshi Koga