Patents by Inventor Michelle Portwood

Michelle Portwood 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).

  • Method for recovery of hydrocarbon diluent from tailing
    Patent number: 6358404
    Abstract: A method for recovery of hydrocarbon diluent from tailings produced in a bitumen froth treatment plant comprises introducing the tailings into a steam stripping vessel maintained at near atmospheric pressure, said vessel having a plurality of interior, vertically spaced shed decks, and distributing the tailings over said shed decks. Steam is introduced below the shed decks for vaporizing the major portion of the contained diluent and some water.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: March 19, 2002
    Assignee: AEC Oil Sands, L.P.
    Inventors: Wayne Brown, Michelle Portwood, Fran King, Barry Bara, Michael Wagner