Patents by Inventor Siwon Choi

Siwon Choi 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).

  • Ion concentration polarization-electrocoagulation hybrid water treatment system
    Patent number: 10099945
    Abstract: Between two juxtaposed similar ion exchange membranes (AEMs or CEMs), an ion depletion zone and ion enrichment zone are generated under an electric field. As cations are selectively transferred through the CEMs, for example, anions are relocated in order to achieve electro-neutrality, resulting in the concentration drop (increase) in ion depletion (enrichment) zone. The use of a sacrificial metal anode allows electrocoagulation (EC) concurrently with ICP thereby permitting concentration of both ionic and non-ionic impurities to occur at the same time within the same cell or device.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: October 16, 2018
    Assignee: Massachusetts Institute of Technology
    Inventors: Siwon Choi, Jongyoon Han
  • Ion Concentration Polarization-Electrocoagulation Hybrid Water Treatment System
    Publication number: 20180141832
    Abstract: Between two juxtaposed similar ion exchange membranes (AEMs or CEMs), an ion depletion zone and ion enrichment zone are generated under an electric field. As cations are selectively transferred through the CEMs, for example, anions are relocated in order to achieve electro-neutrality, resulting in the concentration drop (increase) in ion depletion (enrichment) zone. The use of a sacrificial metal anode allows electrocoagulation (EC) concurrently with ICP thereby permitting concentration of both ionic and non-ionic impurities to occur at the same time within the same cell or device.
    Type: Application
    Filed: November 17, 2017
    Publication date: May 24, 2018
    Inventors: Siwon Choi, Jongyoon Han
  • Ion concentration polarization-electrocoagulation hybrid water treatment system
    Patent number: 9850146
    Abstract: Between two juxtaposed similar ion exchange membranes (AEMs or CEMs), an ion depletion zone and ion enrichment zone are generated under an electric field. As cations are selectively transferred through the CEMs, for example, anions are relocated in order to achieve electro-neutrality, resulting in the concentration drop (increase) in ion depletion (enrichment) zone. The use of a sacrificial metal anode allows electrocoagulation (EC) concurrently with ICP thereby permitting concentration of both ionic and non-ionic impurities to occur at the same time within the same cell or device.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: December 26, 2017
    Assignee: Massachusetts Institute of Technology
    Inventors: Siwon Choi, Jongyoon Han
  • Ion Concentration Polarization-Electrocoagulation Hybrid Water Treatment System
    Publication number: 20170066665
    Abstract: Between two juxtaposed similar ion exchange membranes (AEMs or CEMs), an ion depletion zone and ion enrichment zone are generated under an electric field. As cations are selectively transferred through the CEMs, for example, anions are relocated in order to achieve electro-neutrality, resulting in the concentration drop (increase) in ion depletion (enrichment) zone. The use of a sacrificial metal anode allows electrocoagulation (EC) concurrently with ICP thereby permitting concentration of both ionic and non-ionic impurities to occur at the same time within the same cell or device.
    Type: Application
    Filed: September 17, 2015
    Publication date: March 9, 2017
    Inventors: Siwon Choi, Jongyoon Han