Patents by Inventor George M. Cowan

George M. Cowan 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).

  • Assaying method
    Patent number: 7066981
    Abstract: The invention provides a method of assaying a mineral sample for determining the concentration of selected metals in a sample comprising the steps of providing a comminuted mineral sample; mixing such sample with a flux; preheating a reaction vessel to a temperature which approximates the melting point of the flux; introducing the mixture of the mineral sample and flux into the crucible, whereby the mixture is transformed to a molten state to capture the metal to be assayed in a collector material; and separating slag from the collector material.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: June 27, 2006
    Assignee: Innovative MET Products (PTY) Limited
    Inventors: George M. Cowan, Boyne F. Hohenstein, Keith S. McIntosh, Pierre K. Hofmeyer
  • Assaying method
    Publication number: 20040025636
    Abstract: The invention provides a method of assaying a mineral sample for determining the concentration of selected metals in a sample comprising the steps of providing a comminuted mineral sample; mixing such sample with a flux; preheating a reaction vessel to a temperature which approximates the melting point of the flux; introducing the mixture of the mineral sample and flux into the crucible, whereby the mixture is transformed to a molten state to capture the metal to be assayed in a collector material; and separating slag from the collector material.
    Type: Application
    Filed: February 12, 2003
    Publication date: February 12, 2004
    Inventors: George M Cowan, Boyne F Hohenstein, Keith S McIntosh, Pierre K Hofmeyer