Patents by Inventor Gary O'Connell

Gary O'Connell 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).

  • Treatment of metal sulphide concentrates by roasting and electrically stabilized open-arc furnace smelt reduction
    Patent number: 6699302
    Abstract: A process for treating a metal sulphide concentrate which includes the steps of: a) roasting the concentrate to reduce the sulphide content of the concentrate, to a negligible value and b) melting the concentrate, under reducing conditions, in an electrically stabilized open-arc furnace, in particular a DC arc furnace.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: March 2, 2004
    Assignee: Mintek
    Inventors: Rodney T Jones, Nicholas A. Barcza, Gary Kaiura, Gary O'Connell, Anthony Hannaford