Patents by Inventor Stephen W. Saunders

Stephen W. Saunders 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).

  • Ore beneficiation process
    Patent number: 4615869
    Abstract: Phosphatic clay dispersions are modified by dispersing the phosphate matrix containing the clay in a dilute solution of selected acids prior to screening, sizing and other beneficiation operations.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: October 7, 1986
    Assignee: Mobil Oil Corporation
    Inventors: Ross A. Kremer, Stephen W. Saunders
  • Treatment of water used in preparing phosphate matrix slurries
    Patent number: 4585629
    Abstract: There are disclosed method and compositions for reducing the viscosity of phosphate matrix slurries and improving consolidation characteristics of slimes resulting from the beneficiation of the slurries. An unexpectedly greater degree of viscosity reduction and clay consolidation characteristics improvement is obtained by adding the compositions to the water utilized to slurry the phosphate matrix prior to the information of the slurries. The compositions include water-soluble compounds, such as organic acids, mineral acids, monovalent inorganic salts and polyvalent inorganic salts.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: April 29, 1986
    Assignee: Mobil Oil Corporation
    Inventors: Ross A. Kremer, Stephen W. Saunders
  • Treatment of phosphate ore used in preparing phosphate matrix slurries
    Patent number: 4559204
    Abstract: There is disclosed a method of producing water-based phosphate matrix slurries wherein the as-mined phosphate matrix is dried prior to the formation of the slurry. Drying the matrix decreases the viscosity of the slurry and improves the clay consolidation characteristics of the by-product slimes produced during the phosphate slurry beneficiation process steps.
    Type: Grant
    Filed: August 17, 1984
    Date of Patent: December 17, 1985
    Assignee: Mobil Oil Corporation
    Inventors: Anil K. Agrawal, Stephen W. Saunders, George J. Weckesser
  • Ore beneficiation process
    Patent number: 4514288
    Abstract: By dispersing a clay-containing mineral matrix in an aqueous solution of EDTA before washing or classifying the ore, one obtains a system in which the subsequently formed clays consolidate at an unexpectedly high rate and to a higher final density.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: April 30, 1985
    Assignee: Mobil Oil Corporation
    Inventors: Ross A. Kremer, Stephen W. Saunders