Patents by Inventor Martin T. Errington

Martin T. Errington 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).

  • Extraction of metal values from ores or concentrates
    Patent number: 4822413
    Abstract: A process is described for leaching ores or concentrates containing one or more metallic sulphides .with a circulating liquor so as to solubilize desired metal values therefrom, if said metal values are capable of dissolution in an acidic ferric sulphate solution (e.g. copper), or so as to render the desired metal values (e.g. gold) more accessible to subsequent processing, in each case by effecting metallic sulphide dissolution from the ore or concentrate.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: April 18, 1989
    Assignee: Davy McKee (Stockton) Limited
    Inventors: Frederick D. Pooley, Martin T. Errington