Patents by Inventor Stephen H. Rosansky

Stephen H. Rosansky 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).

  • Salt separation and destruction of PFAS utilizing reverse osmosis and salt separation
    Patent number: 11891323
    Abstract: Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water is concentrated in a reverse osmosis step and salt from the resulting solution is removed in supercritical conditions prior to destruction of PFAS in supercritical conditions.
    Type: Grant
    Filed: August 9, 2022
    Date of Patent: February 6, 2024
    Assignee: Revive Environmental Technology, LLC
    Inventors: Stephen H. Rosansky, Michael Miller, Patrick Norris, Darwin Argumedo, Douglas Hendry, Ian Haggerty, Keith Brown, Joshua James, Joseph Casciano, Slawomir Winecki, Vivek Lal, Tom McGuinness
  • Destruction of Perfluorosulfonic Acids (PFSAs) via Supercritical Water Oxidation
    Publication number: 20230373824
    Abstract: Supercritical water oxidation (SCWO) is a destruction technology to quickly treat per- and polyfluoroalkyl substance (PFAS)-impacted groundwater, investigation derived waste, and other aqueous matrices such as landfill leachate and aqueous film forming foam. Laboratory-prepared and field-collected samples with inlet PFAS concentrations up to 50 parts per million were consistently destroyed to less than 70 parts per trillion for all PFAS, when running at the determined optimal operating conditions (?600° C. and 3,500 pounds per square inch). We investigated the correlation between temperature and flowrate of the system, finding that reactor temperatures ?450° C. destroys perfluorinated carbonic acids, but higher temperatures and specified conditions are necessary to destroy perfluorosulfonic acids. Using a higher density oxygen source also increases the throughput of a SCWO reactor, here up to 140 mL/min, without affecting PFAS destruction. Continuous 5-log reduction in the concentration of PFAS (99.
    Type: Application
    Filed: May 22, 2023
    Publication date: November 23, 2023
    Inventors: Christopher Scheitlin, Kavitha Dasu, Stephen H. Rosansky, Julia Stowe
  • Salt Separation and Destruction of PFAS Utilizing Reverse Osmosis and Salt Separation
    Publication number: 20230047367
    Abstract: Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water is concentrated in a reverse osmosis step and salt from the resulting solution is removed in supercritical conditions prior to destruction of PFAS in supercritical conditions.
    Type: Application
    Filed: August 9, 2022
    Publication date: February 16, 2023
    Inventors: Stephen H. Rosansky, Michael Miller, Patrick Norris, Darwin Argumedo, Douglas Hendry, Ian Haggerty, Keith Brown, Joshua James, Joseph Casciano, Slawomir Winecki, Vivek Lal, Tom McGuinness
  • Salt separation and destruction of PFAS utilizing reverse osmosis and salt separation
    Patent number: 11407666
    Abstract: Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water is concentrated in a reverse osmosis step and salt from the resulting solution is removed in supercritical conditions prior to destruction of PFAS in supercritical conditions.
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: August 9, 2022
    Assignee: Battelle Memorial Institute
    Inventors: Stephen H. Rosansky, Michael Miller, Patrick Norris, Darwin Argumedo, Douglas Hendry, Ian Haggerty, Keith Brown, Joshua James, Joseph Casciano, Slawomir Winecki, Vivek Lal, Tom McGuinness
  • Salt Separation and Destruction of PFAS Utilizing Reverse Osmosis and Salt Separation
    Publication number: 20220041483
    Abstract: Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water is concentrated in a reverse osmosis step and salt from the resulting solution is removed in supercritical conditions prior to destruction of PFAS in supercritical conditions.
    Type: Application
    Filed: August 6, 2021
    Publication date: February 10, 2022
    Inventors: Stephen H. Rosansky, Michael Miller, Patrick Norris, Darwin Argumedo, Douglas Hendry, Ian Haggerty, Keith Brown, Joshua James, Joe Casciano, Slawomir Winecki, Vivek Lal, Tom McGuinness