Patents by Inventor Kengo Ohara

Kengo Ohara 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).

  • Mud material used for iron tap hole in blast furnace
    Patent number: 5411997
    Abstract: The object of the present invention is to develop an innovative mud material which has the properties of a resin-type mud material for improving the working environment, which mud material is capable of increasing the depth of an iron tap hole and of improving the adhesion to mud material deposited in a furnace at high heat, such adhesion being a drawback of the conventional art.This invention provides a mud material used for an iron tap hole in a blast furnace, wherein 8 to 20 wt % of a solution of a novolak-type phenolic resin having a specific number-average molecular weight and serving as a binder is added to and blended with a refractory aggregate used as a conventional mud material.
    Type: Grant
    Filed: November 5, 1992
    Date of Patent: May 2, 1995
    Assignee: Shinagawa Rozai Kabushiki Kaisha
    Inventors: Kengo Ohara, Hirao Omori, Osamu Michihiro, Makoto Suga, Kouji Shimomura, Toshitake Okada, Yuji Ochiai