Patents by Inventor Sue T. Foster, executrix

Sue T. Foster, executrix 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).

  • Thermal stabilizer for non-clay wellbore fluids
    Patent number: 4290899
    Abstract: Calcined dolomite stabilizes aqueous solutions of viscosifiers, such as polysaccharides, exposed to temperatures as high as 200.degree. F. (93.degree. C.) for prolonged periods.
    Type: Grant
    Filed: January 4, 1979
    Date of Patent: September 22, 1981
    Assignee: Union Carbide Corporation
    Inventors: Thomas R. Malone, Talmage D. Foster, Jr., deceased, Sue T. Foster, executrix