Patents by Inventor Yoji Demoto

Yoji Demoto 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).

  • Apparatus for preheating and melting of scrap and process for the same
    Patent number: 5889810
    Abstract: A preheating and melting apparatus for scrap, for preheating and melting the scrap highly efficiently, includes a scrap melting furnace having a top blowing lance and an electric arc heater and a preheater for introducing an exhaust gas generated from the melting furnace and preheating the scrap. The scrap preheater is a shaft furnace and a rotary furnace is disposed at the bottom portion of the shaft furnace to continue the shaft furnace. The scrap discharged from the shaft furnace is transferred into the rotary furnace and it is then charged into the scrap melting furnace.
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: March 30, 1999
    Assignee: Nippon Steel Corporation
    Inventors: Hiroyuki Katayama, Kenro Sato, Akio Kasama, Yasushi Okumura, Yoji Demoto, Shinya Kitamura, Toshiya Harada