Patents by Inventor Thomas W. Stubblefield

Thomas W. Stubblefield 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).

  • Patent number: 5204101
    Abstract: A method and composition for treating Acquired Immunodeficiency Virus infections with a composition formulated from dried powders of Phytolacca americana, Rumex acetosella and Rutacea liminonia. The resulting composition acts as an anti-viral agent.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: April 20, 1993
    Inventors: Thomas W. Stubblefield, Betty J. Cothran
  • Patent number: 4205289
    Abstract: Electrical inductive apparatus cooled by a two-phase dielectric fluid which vaporizes within the normal operating temperature range of the apparatus. The electrical inductive apparatus consists of a sealed enclosure surrounding a magnetic core and electrical winding assembly. A non-condensable gas fills a major portion of the enclosure at no-load conditions to provide adequate dielectric strength around the apparatus and is substantially removed to a storage tank when the apparatus reaches normal operating conditions. The required volume of the storage reservoir is proportional to the free volume of the enclosure and the volume of liquid dielectric disposed therein. The bottom surface of the enclosure includes a recessed channel portion configured to closely surround the lower yoke of the magnetic core and which serves to reduce the amount of liquid dielectric utilized and the free volume of the enclosure thereby minimizing the required volume of the storage reservoir for the non-condensable gas.
    Type: Grant
    Filed: April 25, 1978
    Date of Patent: May 27, 1980
    Assignee: Electric Power Research Institute, Inc.
    Inventor: Thomas W. Stubblefield
  • Patent number: 4173746
    Abstract: Electrical apparatus cooled by dielectric fluid which vaporizes within the normal operating temperature range of the electrical apparatus. The electrical apparatus includes a plurality of fluid flow passages extending vertically therethrough which have widths within the range of approximately 0.010 inch to approximately 0.060 inch. The small width of the fluid flow passages causes the dielectric fluid to uniformly coat or wet both wall surfaces of the passages as it flows therethrough.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: November 6, 1979
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Thomas W. Stubblefield, Frank W. Benke