Patents by Inventor Richard Stratton-Crawley

Richard Stratton-Crawley 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).

  • Pyrometallurgical copper refining
    Patent number: 4830667
    Abstract: A copper converting process starting with white metal or a mixture of white metal and metallic copper in which oxidizing gas contacts the molten copper mass either at or near the top surface of the molten mass while the mass is sparged with an inert gas from at or near the bottom of the mass and sparging is continued after contact with the oxidizing gas ceases.
    Type: Grant
    Filed: March 17, 1988
    Date of Patent: May 16, 1989
    Assignee: Inco Limited
    Inventors: Samuel W. Marcuson, Carlos M. Diaz, James A. E. Bell, Haydn Davies, Richard Stratton-Crawley