Patents by Inventor Ralph Hackl

Ralph Hackl 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 FOR THIOSULFATE LEACHING OF PRECIOUS METAL-CONTAINING MATERIALS
    Publication number: 20080105088
    Abstract: Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polythionates, inert atmospheres to control polythionate production, and electrolytic solutions which provide relatively high rates of precious metal recovery.
    Type: Application
    Filed: October 29, 2007
    Publication date: May 8, 2008
    Applicant: PLACER DOME TECHNICAL SERVICES LIMITED
    Inventors: Jinxing Ji, Christopher Fleming, Paul West-Sells, Ralph Hackl
  • METHOD FOR THIOSULFATE LEACHING OF PRECIOUS METAL-CONTAINING MATERIALS
    Publication number: 20070089566
    Abstract: Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ heap leaching or lixiviants that include one or more blinding agents.
    Type: Application
    Filed: December 19, 2006
    Publication date: April 26, 2007
    Applicant: Placer Dome Technical Services Limited
    Inventors: Ralph Hackl, Jinxing Ji, Paul West-Sells