Patents by Inventor Minoru Shigeno

Minoru Shigeno 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).

  • Method of plugging up a taphole in a blast furnace
    Patent number: 4384706
    Abstract: A taphole in a blast furnace is plugged up by charging a mud into the taphole, driving a steel rod into the mud by means of an opener, stopping the driving of the steel rod into the mud when a rear end of the steel rod positions in the middle of the furnace wall and again charging a mud into a cavity behind the rear end of the steel rod embedded in the mud.
    Type: Grant
    Filed: January 2, 1981
    Date of Patent: May 24, 1983
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshimi Shirasaka, Minoru Shigeno, Toshinori Minakawa