Patents by Inventor Haruo Ootuka

Haruo Ootuka 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).

  • Porous ceramic structure
    Patent number: 4530864
    Abstract: A porous ceramic structure adapted in a molten metal container in a way such that the structure pierces the wall of the container for introducing a gas thereinto. The structure comprises a main body made of a porous ceramic material and having a recession on the side adjacent to the outer surface of the container and a sub-body made of a porous ceramic material fitted in the recession of the main body. This ceramic structure enables the operator to make timely judgment for its replacement with new one before it breaks down to cause leakage of molten metal from its container.
    Type: Grant
    Filed: August 28, 1984
    Date of Patent: July 23, 1985
    Assignees: Toshiba Ceramics Co., Ltd., Nippon Steel Corporation
    Inventors: Masuo Sugie, Koji Kurihara, Yoshiro Aiba, Nobiru Komatsu, Haruo Ootuka, Kaoru Nishikido