Patents by Inventor Kevin Simon Joseph Dufresne

Kevin Simon Joseph Dufresne 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).

  • Combined microfiltration or ultrafiltration and reverse osmosis processes
    Patent number: 9227159
    Abstract: A water treatment system combines a microfiltration or ultrafiltration membrane system with a downstream reverse osmosis membrane system. The MF or UF system has multiple trains of immersed membrane modules. The trains are connected to a common permeate pump. The permeate pump discharges directly into the inlet of an RO feed pump. The membrane trains are each subjected to the same suction. The permeate pumps are operated to provide the required flow to the RO feed pump at or above the minimum inlet pressure of the RO feed pump.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: January 5, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Kevin Simon Joseph Dufresne, Denis Joel Marie Guibert
  • COMBINED MICROFILTRATION OR ULTRAFILTRATION AND REVERSE OSMOSIS PROCESSES
    Publication number: 20130118978
    Abstract: A water treatment system combines a microfiltration or ultrafiltration membrane system with a downstream reverse osmosis membrane system. The MF or UF system has multiple trains of immersed membrane modules. The trains are connected to a common permeate pump. The permeate pump discharges directly into the inlet of an RO feed pump. The membrane trains are each subjected to the same suction. The permeate pumps are operated to provide the required flow to the RO feed pump at or above the minimum inlet pressure of the RO feed pump.
    Type: Application
    Filed: November 15, 2011
    Publication date: May 16, 2013
    Applicant: GENERAL ELECTRIC COMPANY, A NEW YORK CORPORATION
    Inventors: Kevin Simon Joseph DUFRESNE, Denis Joel Marie GUIBERT
  • MEMBRANE BATCH FILTRATION PROCESS
    Publication number: 20080203019
    Abstract: A membrane batch filtration process has a step of reducing the water level in the tank by permeation prior to emptying the tank to reduce the volume of water drained after each batch. Permeation may continue even after a portion of the membranes is exposed to air to further lower the water level. The membranes may be backwashed after the water level has been lowered. The water level may be lowered again after the backwash. The tank drain may begin with a portion of the membranes exposed to air.
    Type: Application
    Filed: May 13, 2008
    Publication date: August 28, 2008
    Inventors: Nicholas William Harcsar Adams, Manwinder Singh, Kevin Simon Joseph Dufresne, Pierre Lucien Cote