Patents by Inventor Shoji Miyagawa

Shoji Miyagawa 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 treating zinc-containing substance
    Patent number: 5766307
    Abstract: Method and apparatus for collecting valuable products, particularly zinc, from a zinc-containing substance such as electric furnace dust. A shaft type smelting reduction furnace has a packed bed of a carbonaceous solid reducing agent and has upper and lower tuyeres, and a zinc-containing substance is injected through tuyeres to reduce and vaporize zinc, which is directly contacted by a liquid coolant thereby forming a slurry, and the zinc product is collected from the slurry.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: June 16, 1998
    Assignee: Kawasaki Steel Corporation
    Inventors: Shoji Miyagawa, Hiroshi Itaya, Tetsuya Fujii, Yoshiaki Hara