Patents by Inventor Yasuhide Koga

Yasuhide 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).

  • Brick casting method of making a stave cooler
    Patent number: 4892293
    Abstract: A method of producing a hearth stave cooler including a cooling pipe cast therein for cooling furnace walls of a blast furnace or the like and having refractory bricks on the working side of the stave cooler, wherein one of the upper and lower surfaces of each refractory brick to be brought into contact with molten iron is covered with a heat-insulating buffer material, the other surface is covered with metal wool, and the back of each refractory brick is preferably covered with the heat-insulating buffer material or the metal wool and then the molten iron is cast.
    Type: Grant
    Filed: March 15, 1989
    Date of Patent: January 9, 1990
    Assignee: Nippon Steel Corporation
    Inventors: Yoichiro Kato, Hiroyuki Takao, Yasuhide Koga, Tsuguro Takashima