Patents by Inventor Gary P. Willers

Gary P. Willers 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).

  • Supercritical extraction process
    Patent number: 4482453
    Abstract: The recovery of hydrocarbon values from high metals content feeds can be carried out more efficiently via supercritical extraction with recycle of a portion of the asphalt product and proper control of the use of countercurrent solvent flow to said extraction.
    Type: Grant
    Filed: August 17, 1982
    Date of Patent: November 13, 1984
    Assignee: Phillips Petroleum Company
    Inventors: Daniel M. Coombs, Gary P. Willers