Patents by Inventor Yogiro Yamaoka

Yogiro Yamaoka 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 and apparatus for denitrifying coke
    Patent number: 4025610
    Abstract: A grain coke is packed in a vertical furnace between a pair of opposite electrodes for passing current through the coke, thus heating the same to a temperature of above 1400.degree. C, preferably 1500.degree. C for more than 10 minutes. Coke is loaded into the furnace from an upper portion and heat treated coke is cooled and then discharged from the bottom. Inert or reducing gas may be introduced into the lower portion of the furnace and discharged from the upper portion thereby cooling heat treated coke and preheating loaded coke.
    Type: Grant
    Filed: December 13, 1974
    Date of Patent: May 24, 1977
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Gyoichi Suzuki, Ryo Ando, Hideyuki Yoshikoshi, Seishiro Nagaoka, Yogiro Yamaoka