Patents by Inventor Victor John Ketcham

Victor John Ketcham 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).

  • Processing of Metal Values from Concentrates
    Publication number: 20090293680
    Abstract: The present invention relates to an improved method for the recovery of metal values, in particular copper and gold, from a metal value-bearing material containing arsenic and/or antimony and a source of sulphate ions, by means of a high temperature pressure oxidation process followed by cyanidation of the resultant high temperature pressure oxidation residue.
    Type: Application
    Filed: March 23, 2007
    Publication date: December 3, 2009
    Inventors: Ian Christopher Ritchie, Victor John Ketcham, Karel John Osten
  • PROCESS FOR RECOVERY OF METAL VALUES FROM MATERIALS CONTAINING ARSENIC AND/OR ANTIMONY
    Publication number: 20090019970
    Abstract: A method for the recovery of metal values from a metal value-bearing material containing arsenic and/or antimony and a source of sulphate ions such as sulphide ore or concentrate is disclosed.
    Type: Application
    Filed: October 19, 2006
    Publication date: January 22, 2009
    Applicant: Dundee Precious Metals Inc.
    Inventors: Ian Christopher Ritchie, Victor John Ketcham