Patents by Inventor Hidenori Horii

Hidenori Horii 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 making butt welded tubes
    Patent number: 3938724
    Abstract: A butt welded tube is provided having excellent properties by the steps of forming a skelp onto a round shape, butt welding the edges thereof with butt welding rolls, blowing oxygen or air into the weld zone, so that said zone is brought to a melted condition with oxidizing heat based on said blowing and some notches which are formed are blown off with said blowing, and then said tube is passed through a train of reducing rolls to obtain a smooth surface and the required dimension of said tube.
    Type: Grant
    Filed: June 29, 1973
    Date of Patent: February 17, 1976
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Takao Nakamura, Itsuo Hirose, Rokuro Misawa, Hidenori Horii, Akira Hagio, Tetsuo Sada