Patents by Inventor Joshua Griffis

Joshua Griffis 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).

  • Publication number: 20210139351
    Abstract: A method of operating an electrochemical cell including introducing an aqueous solution into the electrochemical cell, applying a current across an anode and a cathode to produce a product, monitoring the voltage, dissolved hydrogen, or a condition of the aqueous solution, and applying the current in a pulsed waveform responsive to one of the measured parameters is disclosed. An electrochemical system including an electrochemical cell including an anode and a cathode, a source of an aqueous solution having an outlet fluidly connectable to the electrochemical cell, a sensor for measuring a parameter, and a controller configured to cause the anode and the cathode to apply the current in a pulsed waveform responsive to the parameter measurement is disclosed. Methods of suppressing accumulation of hydrogen gas within the electrochemical cell are also disclosed. Methods of facilitating operation of an electrochemical cell are also disclosed.
    Type: Application
    Filed: March 6, 2018
    Publication date: May 13, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: George Gu, Simon Paul Dukes, Joshua Griffis, Michael Shaw
  • Publication number: 20210139352
    Abstract: Self-cleaning electrochemical cells, systems including self-cleaning electrochemical cells, and methods of operating self-cleaning electrochemical cells are disclosed. The self-cleaning electrochemical cell can include a plurality of concentric electrodes disposed in a housing, for example, a cathode and an anode, a fluid channel defined between the concentric electrodes, a separator residing between the concentric electrodes, first and second end caps coupled to respective ends of the housing, and an inlet cone. The separators may be configured to localize the electrodes and dimensioned to minimize a zone of reduced velocity occurring downstream from the separator. The end caps and inlet cone may be dimensioned to maintain fully developed flow and minimize pressure drop across the electrochemical cell.
    Type: Application
    Filed: April 13, 2018
    Publication date: May 13, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Joshua Griffis, Andrew Green, Li-Shiang Liang, Paul Beddoes
  • Publication number: 20210130966
    Abstract: An electrochemical cell including a first chamber having an anode, a second chamber having a cathode, at least one ionic connection between the first chamber and the second chamber, such that liquid electrolyte from the first chamber is prevented from mixing with liquid electrolyte in the second chamber is provided. The first chamber and the second chamber can be arranged in parallel and positioned remotely from each other. An electrochemical system including the electrochemical cell, and first and second sources of saline aqueous solutions is also provided. Water treatment systems are also provided. A method of operating an electrochemical cell including introducing first and second saline aqueous solutions into first and second chambers of the electrochemical cell, and applying a current across the anode and the cathode to generate first and second products, respectively is also provided. A method of facilitating operation of an electrochemical cell is also provided.
    Type: Application
    Filed: March 6, 2018
    Publication date: May 6, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Joshua Griffis, George Gu, Simon P. Dukes
  • Publication number: 20210107812
    Abstract: Self-cleaning electrochemical cells, systems including self-cleaning electrochemical cells, and methods of operating self-cleaning electrochemical cells are disclosed. The self-cleaning electrochemical cell can include a plurality of concentric electrodes disposed in a housing, a fluid channel defined between the concentric electrodes, and an electrical connector positioned at a distal end of a concentric electrode and electrically connected to the electrode. The electrical connectors may be configured to provide a substantially even current distribution to the concentric electrode and minimize a zone of reduced velocity occurring downstream from the electrical connector. The electrical connector may be configured to cause a temperature of an electrolyte solution to increase by less than about 0.5° C. while transmitting at least 100 W of power.
    Type: Application
    Filed: April 13, 2018
    Publication date: April 15, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Andrew Green, Li-Shiang Liang, Joshua Griffis, Paul Beddoes
  • Publication number: 20210087081
    Abstract: An electrochlorination system comprises a source of feed fluid, a product fluid outlet, and a plurality of electrochemical cells connected fluidically between the source of feed fluid and the product fluid outlet. The system is configured to operate at least one of the plurality of electrochemical cells at one of a first current density or a first flow rate, and to operate another of the plurality of electrochemical cells at a second current density or second flow rate different from the respective first current density or first flow rate.
    Type: Application
    Filed: February 22, 2019
    Publication date: March 25, 2021
    Applicants: Evoqua Water Technologies LLC, Evoqua Water Technologies Limited
    Inventors: Joshua Griffis, Simon Dukes, Paul Beddoes, Peter G. Rogers
  • Publication number: 20210047217
    Abstract: An electrochlorination system includes an electrolyzer fluidically connectable between a source of feed fluid and a product fluid outlet, and a sub-system configured to one of increase a pH of the feed fluid, or increase a ratio of monovalent to divalent ions in the feed fluid, upstream of the electrolyzer.
    Type: Application
    Filed: February 27, 2019
    Publication date: February 18, 2021
    Applicant: Evoqua Water Technolgies LLC
    Inventors: Joshua Griffis, Simon P. Dukes, LI-Shiang Liang, Darren Dale, Michael Shaw, Paul Beddoes, George Y. Gu
  • Publication number: 20210001276
    Abstract: An electrochemical separation device includes a first electrode, a second electrode, a cell stack including alternating depleting compartments and concentrating compartments disposed between the first electrode and the second electrode, an inlet manifold configured to introduce a fluid to one of the depleting compartments or the concentrating compartments an outlet manifold, and one or more of a fluid flow director disposed within the inlet manifold and having a surface configured to alter a flow path of the fluid introduced into the inlet manifold and direct the fluid into the one of the depleting compartments or the concentrating compartments, and a second fluid flow director disposed within the outlet manifold and having a surface configured to alter a flow path of the fluid introduced into the outlet manifold via one of the depleting compartments or the concentrating compartments.
    Type: Application
    Filed: June 20, 2018
    Publication date: January 7, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Joshua Griffis, Li-Shiang Liang, William Lane, Simon P. Dukes, Kris Wy Loon LIM
  • Patent number: 10814280
    Abstract: A module comprises a cell stack having a plurality of alternating ion depleting compartments and ion concentrating compartments, an inlet manifold configured to facilitate a flow of fluid into the cell stack, and a first flow distribution system, associated with the inlet manifold, including a first ramp to promote the circulation of the flow of fluid into the cell stack.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: October 27, 2020
    Inventors: Joshua Griffis, Li-Shiang Liang
  • Patent number: 10800678
    Abstract: An electrochlorination system comprising an electrochemical cell including a housing having an inlet, an outlet, and an anode-cathode pair disposed within the housing, a source of a chloride-containing aqueous solution having an outlet fluidly connectable to the inlet of the electrochemical cell, and a source of an oxidizing agent fluidly connectable to the source of chloride-containing aqueous solution upstream of the electrochemical cell.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: October 13, 2020
    Assignee: Evoqua Water Technologies LLC
    Inventors: Joseph D. Gifford, Joshua Griffis, Simon P. Dukes, Li-Shiang Liang, Michael J. Shaw, Frederick C. Wilkins
  • Publication number: 20200129926
    Abstract: An electrochemical separation device includes a first electrode, a second electrode, and a cell stack including a plurality of sub-blocks each having alternating depleting compartments and concentrating compartments and each including frame and channel portions disposed between the first electrode and the second electrode. An internal seal formed of a first material is disposed between and in contact with the channel portions between adjacent sub-blocks in the cell stack and configured to prevent leakage between depleting compartments and concentrating compartments in the adjacent sub-blocks. An external seal formed of a second material having at least one material parameter different from the first material is disposed between and in contact with the frames of the adjacent sub-blocks in the cell stack and configured to prevent leakage from an internal volume of the electrochemical separation device to outside of the electrochemical separation device.
    Type: Application
    Filed: July 11, 2018
    Publication date: April 30, 2020
    Applicant: Evoqua Water Technologies LLC
    Inventors: Michael J. Muse, Joshua Griffis, LI-Shiang Liang, Michael Shaw, Simon P. Dukes
  • Publication number: 20180257961
    Abstract: An electrochlorination system comprising an electrochemical cell including a housing having an inlet, an outlet, and an anode-cathode pair disposed within the housing, a source of a chloride-containing aqueous solution having an outlet fluidly connectable to the inlet of the electrochemical cell, and a source of an oxidizing agent fluidly connectable to the source of chloride-containing aqueous solution upstream of the electrochemical cell.
    Type: Application
    Filed: September 16, 2016
    Publication date: September 13, 2018
    Inventors: Joseph D. Gifford, Joshua Griffis, Simon P. Dukes, Li-Shiang Liang, Michael J. Shaw, Frederick C. Wilkins
  • Publication number: 20180111093
    Abstract: A module comprises a cell stack having a plurality of alternating ion depleting compartments and ion concentrating compartments, an inlet manifold configured to facilitate a flow of fluid into the cell stack, and a first flow distribution system, associated with the inlet manifold, including a first ramp to promote the circulation of the flow of fluid into the cell stack.
    Type: Application
    Filed: April 22, 2016
    Publication date: April 26, 2018
    Inventors: Joshua Griffis, Li-Shiang Liang
  • Patent number: D777295
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: January 24, 2017
    Inventors: Joshua Griffis, Jacob Telepciak, Peter Farrell, Charles Buzzell