Patents by Inventor Patrick Shane Wolfe

Patrick Shane Wolfe 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).

  • Sulfonated internal olefin surfactant for enhanced oil recovery
    Patent number: 8403044
    Abstract: A process for recovering oil from an oil-bearing formation comprises introducing into said formation an aqueous composition comprising at least one sulfonated derivative of one or more internal olefins, said internal olefins being characterized by having low amounts of tri-substitution on the olefin bond, said sulfonated derivative being obtained by sulfonating a composition comprising internal olefins of the formula: R1R2C?CR3R4 wherein R1, R2, R3 and R4 are the same or different and are hydrogen or straight- or branched-chain, saturated hydrocarbyl groups and the total number of carbon atoms of R1, R2, R3 and R4 is 6 to 44 with the proviso that at least about 96 mole percent of R1 and R3 are straight- or branched-chain, saturated hydrocarbyl groups and at least about 96 mole percent of R2 and R4 are hydrogen.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: March 26, 2013
    Assignee: Stepan Company
    Inventors: John C. Hutchison, Patrick Shane Wolfe, Thomas Edward Waldman, Ramakrishna Ravikiran
  • Sulfonated internal olefin surfactant for enhanced oil recovery
    Publication number: 20100282467
    Abstract: A process for recovering oil from an oil-bearing formation comprises introducing into said formation an aqueous composition comprising at least one sulfonated derivative of one or more internal olefins, said internal olefins being characterized by having low amounts of tri-substitution on the olefin bond, said sulfonated derivative being obtained by sulfonating a composition comprising internal olefins of the formula: R1R2C?CR3R4 wherein R1, R2, R3 and R4 are the same or different and are hydrogen or straight- or branched-chain, saturated hydrocarbyl groups and the total number of carbon atoms of R1, R2, R3 and R4 is 6 to 44 with the proviso that at least about 96 mole percent of R1 and R3 are straight- or branched-chain, saturated hydrocarbyl groups and at least about 96 mole percent of R2 and R4 are hydrogen.
    Type: Application
    Filed: May 5, 2010
    Publication date: November 11, 2010
    Applicant: Stepan Company
    Inventors: John C. Hutchison, Patrick Shane Wolfe, Thomas Edward Waldman, Ramakrishna Ravikiran