Patents by Inventor Teddy K. Kwong

Teddy K. Kwong 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).

  • Recycle of secondary froth in the hot water process for extracting bitumen from tar sand
    Patent number: 4776949
    Abstract: Froth, produced by induced air flotation in the hot water process circuit for extracting bitumen from tar sand, is recycled and added to the fresh slurry being introduced to the primary separation vessel. An increase in bitumen recovered as primary froth from the circuit is produced.
    Type: Grant
    Filed: December 5, 1985
    Date of Patent: October 11, 1988
    Assignees: Alberta Energy Company Ltd., Canadian Occidental Petroleum Ltd., Esso Resources Canada Limited, Gulf Canada Limited, Her Majesty the Queen in right of Canada, as represented by The Minister of Natural Resources, Hbog-Oil Sands Limited Partnership, Pancanadian Petroleum Limited, Petro-Canada Inc.
    Inventors: Antony H. S. Leung, Teddy K. Kwong