Patents by Inventor Parkman T. Brooks

Parkman T. Brooks 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).

  • Recovery of tungsten from brines
    Patent number: 4409189
    Abstract: Tungsten is recovered from alkaline brines by: (1) initial loading of metal values on an 8-hydroxyquinoline-resorcinol-formaldehyde resin, (2) selective desorption of boron, arsenic and sulfur from the resin by means of an NH.sub.4 Cl--NH.sub.4 OH solution having a pH of about 7.5 to 9.5, and (3) desorption of tungsten from the resin by means of water or an alkaline solution.
    Type: Grant
    Filed: July 13, 1982
    Date of Patent: October 11, 1983
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: S. Ralph Borrowman, Paulette B. Altringer, Parkman T. Brooks
  • Resin for sorption of tungsten
    Patent number: 4180628
    Abstract: A resin for sorption of tungsten is prepared by copolymerization of 8-hydroxyquinoline, a polyamine, resorcinol and formaldehyde. The resin finds particular utility for recovery of tungsten from alkaline brines.
    Type: Grant
    Filed: July 18, 1978
    Date of Patent: December 25, 1979
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Wayne N. Marchant, Parkman T. Brooks