Patents by Inventor William A. Rendall

William A. Rendall 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).

  • Surfactant-stabilized foams for enhanced oil recovery
    Patent number: 5074358
    Abstract: A foam is provided for use in a subterranean oil-bearing formation for reducing and controlling the mobility of a gaseous drive fluid. The foam is generated using an inert gas and a fluorocarbon surfactant solution in admixture with an amphoteric or anionic hydrocarbon surfactant solution. A relatively small amount of the fluorocarbon surfactant is operative, when mixed with the hydrocarbon surfactant and foamed, to generate a foam that has better stability when in contact with oil than a foam made with hydrocarbon surfactant alone.
    Type: Grant
    Filed: July 3, 1990
    Date of Patent: December 24, 1991
    Assignee: Alberta Oil Sands Technology and Research Authority
    Inventors: William A. Rendall, Conrad Ayasse, Jaromir Novosad
  • Sine wave beam web and method of manufacture
    Patent number: 4084029
    Abstract: The invention disclosed is (1) a sine wave web for structural elements made of composite materials, (2) structural combinations incorporating the web, and (3) a method of manufacturing the web. The concept disclosed avoids bunching and distortion of the fibers of the composite web material as it is shaped and flanged for attachment to adjacent structure, such as the chords and capstrips of an I-beam.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: April 11, 1978
    Assignee: The Boeing Company
    Inventors: William Rendall Johnson, Ralph Raleigh Welsh
  • Method for purifying amine gas sweetening systems by addition of CO.sub.2
    Patent number: H1327
    Abstract: A method for removing dissolved solids or sludge from amine absorbing solutions for acidic gas in gas sweetening systems is provided comprising contacting a stream of regenerated absorbing solution with CO.sub.2 such that the sludge forms a precipitate and removing the precipitate from the absorbing solution. The stream of absorbing solution may then be returned to a regenerator for removal of CO.sub.2 or returned to the gas sweetening system with the regenerated absorbing solution.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: July 5, 1994
    Assignee: Exxon Production Research Company
    Inventors: Michael E. Moir, William A. Rendall