Patents by Inventor Robert S. MacTaggart

Robert S. MacTaggart 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).

  • Oil sand extraction process with in-line middlings aeration and recycle
    Patent number: 5460270
    Abstract: Middlings from the primary separation vessel ("PSV") are recycled through a line to the PSV. The middlings are aerated with fine air bubbles using in line eductor/aerator assemblies. The aerated middlings are mixed as they are pumped through a line back to the PSV. Bitumen recovery from the PSV is increased as a result.
    Type: Grant
    Filed: September 1, 1993
    Date of Patent: October 24, 1995
    Assignees: Alberta Energy Company Ltd., Canadian Occidental Petroleum Ltd., Esso Resources Canada Limited, Gulf Canada Resources Limited, Her Majesty the Queen in right of the Province of Alberta, as represented by the Minister of Energy and Natural Resources, HBOG-Oil Sands Limited Partnership, PanCanadian Petroleum Limited, Petro-Canada Inc., Mocal Energy Limited
    Inventors: Edward W. Chan, Robert S. MacTaggart