Patents by Inventor Richard E. Dardis

Richard E. Dardis 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).

  • Soda-anthraquinone lignin sacrificial agents in oil recovery
    Patent number: 4509597
    Abstract: A supplemental oil recovery method comprising injecting into a subterranean formation a fluid containing soda-anthraquinone lignin which is adsorbed by adsorptive sites therein and functions as a sacrificial agent and thereafter injecting a micellar dispersion containing a surfactant into the subterranean formation to displace the oil contained therein.
    Type: Grant
    Filed: May 3, 1984
    Date of Patent: April 9, 1985
    Assignee: Olin Corporation
    Inventor: Richard E. Dardis