Patents by Inventor Andree H. Wilkinson

Andree H. Wilkinson 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).

  • Well working compositions, method of decreasing the seepage loss from such compositions, and additive therefor
    Patent number: 5004553
    Abstract: The invention provides well working fluid compositions containing oat hulls ground to certain particle size ranges to decrease the seepage loss of the fluid to fluid permeable formations contacted by the compositions. Also provided is a seepage loss additive comprising the ground oat hulls in combination with one or more of ground corn cobs, hydrophobic organophilic water wettable cotton, ground citrus pulp, and ground cotton burrs.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: April 2, 1991
    Assignee: Venture Innovations, Inc.
    Inventors: Roy F. House, Andree H. Wilkinson, Jack C. Cowan