Patents by Inventor Max R. Oswald

Max R. Oswald 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 dissolving copper in the presence of iron
    Patent number: 4578162
    Abstract: The invention is a method for dissolving copper in the presence of iron comprising:(a) contacting the copper with an oxidant solution;(b) dissolving at least a portion of the copper into the solution;(c) controlling the copper ion concentration in the solution below that required to cause a runaway oxidant decomposition reaction;(d) removing at least a portion of the dissolved copper from the solution;(e) adding additional oxidant to the solution; and(f) at least repeating steps (a) and (b).
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: March 25, 1986
    Assignee: The Dow Chemical Company
    Inventors: James A. McIntyre, Robert F. Phillips, Max R. Oswald