Patents by Inventor A. Stephen Zavell

A. Stephen Zavell 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).

  • Underwater scrubbing of CO2 from CO2-containing hydrocarbon resources
    Patent number: 6620091
    Abstract: A method for removing CO2 from a CO2-containing hydrocarbon asset. The process includes contacting a CO2-containing hydrocarbon asset with an aqueous liquid stream at an underwater location so that at least a portion of the CO2 in the hydrocarbon asset is dissolved into the aqueous liquid stream, creating a CO2-depleted hydrocarbon asset and a CO2-enriched aqueous stream. The CO2-enriched aqueous stream is separated from the hydrocarbon asset. Finally, the CO2-enriched aqueous stream is disposed of in at least one of a marine environment, a terrestrial formation, or combination thereof.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: September 16, 2003
    Assignee: Chevron U.S.A. Inc.
    Inventors: A. Stephen Zavell, Dennis J. O'Rear, Curtis Munson