Patents by Inventor Stewart H. Folk

Stewart H. Folk 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).

  • Mining of sulphur with foam barrier
    Patent number: 4413859
    Abstract: A method for mining subsurface deposits by injection of foam or a foaming agent plus air or other gas, or foam-making materials, into a selected porous zone above a sulphur bed or zone, and concomitantly displacing the gas and/or fluids occupying such porous zones concomitantly and/or thereafter, heating the sulphur bed below the foam injected deposit with superheated water or other means with the foam confining the upward movement of the superheated water or other fusion medium to the sulphur-bearing zone.
    Type: Grant
    Filed: August 3, 1981
    Date of Patent: November 8, 1983
    Assignee: Stewart Folk & Company, Incorporated
    Inventor: Stewart H. Folk