Patents by Inventor Willem P. Duyvesteyn

Willem P. Duyvesteyn 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).

  • METHODS FOR EXTRACTING BITUMEN FROM BITUMINOUS MATERIAL
    Publication number: 20110180458
    Abstract: Methods for preparing solvent-dry, stackable tailings. The method can include the steps of adding a first quantity of first solvent to a bitumen material to form a first mixture, separating a first quantity of bitumen-enriched solvent from the first mixture and thereby creating first solvent-wet tailings, adding a quantity of second solvent to first solvent-wet tailings to separate a first quantity of first solvent component from the first solvent-wet tailings and thereby producing second solvent-wet tailings, and adding a quantity of water to the second solvent-wet tailings to separate a first quantity of second solvent component from the second solvent-wet tailings and thereby forming solvent-dry, stackable tailings.
    Type: Application
    Filed: January 22, 2010
    Publication date: July 28, 2011
    Applicant: MARATHON OIL CANADA CORPORATION
    Inventors: Willem P. Duyvesteyn, Julian Kift, Whip C. Thompson