Patents by Inventor Kyoung-Shin Choi

Kyoung-Shin 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).

  • Publication number: 20200248322
    Abstract: Electrochemical cells for the oxidation of 5-hydroxymethylfurfural are provided. Also provided are methods of using the cells to carry out the oxidation reactions. The electrochemical cells and methods use catalytic copper-based anodes to carry out the electrochemical oxidation reactions.
    Type: Application
    Filed: April 21, 2020
    Publication date: August 6, 2020
    Inventors: Kyoung-Shin Choi, Dohwan Nam
  • Patent number: 10669639
    Abstract: Electrochemical cells for the oxidation of 5-hydroxymethylfurfural are provided. Also provided are methods of using the cells to carry out the oxidation reactions. The electrochemical cells and methods use catalytic copper-based anodes to carry out the electrochemical oxidation reactions.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: June 2, 2020
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Kyoung-Shin Choi, Dohwan Nam
  • Patent number: 10655233
    Abstract: Electrochemical and photoelectrochemical cells for the oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid and/or 2,5-diformylfuran are provided. Also provided are methods of using the cells to carry out the electrochemical and photoelectrochemical oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid and/or 2,5-diformylfuran.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: May 19, 2020
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Kyoung-Shin Choi, Hyun Gil Cha
  • Publication number: 20200140296
    Abstract: Electrodialysis cell systems for water deionization is provided. Also provided are methods for using the electrodialysis cell systems. The cells use the forward and reverse reactions of a redox mediator and the combined operations of a deionization cell and an ion-accumulation cell to enable sustainable deionization with a significantly decreased operating voltage, relative to conventional deionization cells. The cells have applications in seawater desalination, water purification, and wastewater treatment.
    Type: Application
    Filed: November 7, 2018
    Publication date: May 7, 2020
    Inventors: Kyoung-Shin Choi, Dohwan Nam, Dong Ki Lee
  • Publication number: 20190382288
    Abstract: Bismuth-based, chloride-storage electrodes and rechargeable electrochemical cells incorporating the chloride-storage electrodes are provided. Also provided are methods for making the electrodes and methods for using the electrochemical cells to remove chloride ions from a sample. The chloride-storage electrodes, which are composed of bismuth metal, can store chloride ions in their bulk by forming BiOCl via an oxidation reaction with bismuth in the presence of an oxygen source.
    Type: Application
    Filed: July 30, 2019
    Publication date: December 19, 2019
    Inventors: Kyoung-Shin Choi, Dohwan Nam
  • Patent number: 10414674
    Abstract: Bismuth-based, chloride-storage electrodes and rechargeable electrochemical cells incorporating the chloride-storage electrodes are provided. Also provided are methods for making the electrodes and methods for using the electrochemical cells to remove chloride ions from a sample. The chloride-storage electrodes, which are composed of bismuth metal, can store chloride ions in their bulk by forming BiOCl via an oxidation reaction with bismuth in the presence of an oxygen source.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: September 17, 2019
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Kyoung-Shin Choi, Dohwan Nam
  • Patent number: 10392715
    Abstract: Electrochemical cells for the reductive amination of furfural-based molecules are provided. Also provided are methods of using the electrochemical cells to carry out the electrochemical reductive amination reactions. Using the cells and methods, furfural-based molecules can be converted into amines via the conversion of their formyl groups to amine groups.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: August 27, 2019
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Kyoung-Shin Choi, John James Roylance
  • Publication number: 20190106796
    Abstract: Methods for electrochemically oxidizing aromatic aldehydes, such as furfural and furfural derivatives, to carboxylic acids in acidic solutions are provided. Also provided are electrochemical cells for carrying out the oxidation reactions. The electrochemical oxidations may be conducted in aqueous media at ambient pressure and mild temperatures.
    Type: Application
    Filed: October 9, 2017
    Publication date: April 11, 2019
    Inventors: Kyoung-Shin Choi, Stephen Riley Kubota
  • Publication number: 20190071787
    Abstract: Electrochemical cells for the oxidation of 5-hydroxymethylfurfural are provided. Also provided are methods of using the cells to carry out the oxidation reactions. The electrochemical cells and methods use catalytic copper-based anodes to carry out the electrochemical oxidation reactions.
    Type: Application
    Filed: September 5, 2017
    Publication date: March 7, 2019
    Inventors: Kyoung-Shin Choi, Dohwan Nam
  • Publication number: 20180201524
    Abstract: Bismuth-based, chloride-storage electrodes and rechargeable electrochemical cells incorporating the chloride-storage electrodes are provided. Also provided are methods for making the electrodes and methods for using the electrochemical cells to remove chloride ions from a sample. The chloride-storage electrodes, which are composed of bismuth metal, can store chloride ions in their bulk by forming BiOCl via an oxidation reaction with bismuth in the presence of an oxygen source.
    Type: Application
    Filed: January 18, 2017
    Publication date: July 19, 2018
    Inventors: Kyoung-Shin Choi, Dohwan Nam
  • Publication number: 20180105940
    Abstract: Electrochemical cells and photoelectrochemical cells for the reduction of furfurals are provided. Also provided are methods of using the cells to carry out the reduction reactions. Using the cells and methods, furfurals can be converted into furan alcohols or linear ketones.
    Type: Application
    Filed: December 15, 2017
    Publication date: April 19, 2018
    Inventors: Kyoung-Shin Choi, John James Roylance, Stephen Riley Kubota
  • Publication number: 20180057949
    Abstract: Electrochemical cells for the reductive amination of furfural-based molecules are provided. Also provided are methods of using the electrochemical cells to carry out the electrochemical reductive amination reactions. Using the cells and methods, furfural-based molecules can be converted into amines via the conversion of their formyl groups to amine groups.
    Type: Application
    Filed: August 29, 2016
    Publication date: March 1, 2018
    Inventors: Kyoung-Shin Choi, John James Roylance
  • Patent number: 9885119
    Abstract: Electrochemical cells and photoelectrochemical cells for the reduction of furfurals are provided. Also provided are methods of using the cells to carry out the reduction reactions. Using the cells and methods, furfurals can be converted into furan alcohols or linear ketones.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: February 6, 2018
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Kyoung-Shin Choi, John James Roylance, Stephen R. Kubota
  • Patent number: 9856567
    Abstract: Photoelectrochemical materials and photoelectrodes comprising the materials are provided. The photoelectrochemical materials comprise a porous, high-surface-area BiVO4 that is composed of particles smaller than the hole diffusion length of BiVO4.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: January 2, 2018
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Kyoung-Shin Choi, Tae Woo Kim
  • Publication number: 20170145572
    Abstract: Electrochemical and photoelectrochemical cells for the oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid and/or 2,5-diformylfuran are provided. Also provided are methods of using the cells to carry out the electrochemical and photoelectrochemical oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid and/or 2,5-diformylfuran.
    Type: Application
    Filed: February 1, 2017
    Publication date: May 25, 2017
    Inventors: Kyoung-Shin Choi, Hyun Gil Cha
  • Patent number: 9598780
    Abstract: Electrochemical and photoelectrochemical cells for the oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid and/or 2,5-diformylfuran are provided. Also provided are methods of using the cells to carry out the electrochemical and photoelectrochemical oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid and/or 2,5-diformylfuran.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: March 21, 2017
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Kyoung-Shin Choi, Hyun Gil Cha
  • Publication number: 20160237576
    Abstract: Electrochemical cells and photoelectrochemical cells for the reduction of furfurals are provided. Also provided are methods of using the cells to carry out the reduction reactions. Using the cells and methods, furfurals can be converted into furan alcohols or linear ketones.
    Type: Application
    Filed: February 12, 2015
    Publication date: August 18, 2016
    Inventors: Kyoung-Shin Choi, John James Roylance
  • Publication number: 20160201204
    Abstract: Electrochemical and photoelectrochemical cells for the oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid and/or 2,5-diformylfuran are provided. Also provided are methods of using the cells to carry out the electrochemical and photoelectrochemical oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid and/or 2,5-diformylfuran.
    Type: Application
    Filed: January 8, 2015
    Publication date: July 14, 2016
    Inventors: Kyoung-Shin Choi, Hyun Gil Cha
  • Patent number: 9359685
    Abstract: A method of forming a conductive polymer deposit on a substrate is disclosed. The method may include the steps of preparing a composition comprising monomers of the conductive polymer and a nitrosyl precursor, contacting the substrate with the composition so as to allow formation of nitrosyl ion on the exterior surface of the substrate, and allowing the monomer to polymerize into the conductive polymer, wherein the polymerization is initiated by the nitrosyl ion and the conductive polymer is deposited on the exterior surface of the substrate. The conductive polymer may be polypyrrole.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: June 7, 2016
    Assignee: Purdue Research Foundation
    Inventors: Kyoung-Shin Choi, Yongju Jung, Nikhilendra Singh
  • Publication number: 20150361566
    Abstract: Photoelectrochemical materials and photoelectrodes comprising the materials are provided. The photoelectrochemical materials comprise a porous, high-surface-area BiVO4 that is composed of particles smaller than the hole diffusion length of BiVO4.
    Type: Application
    Filed: June 16, 2014
    Publication date: December 17, 2015
    Inventors: Kyoung-Shin Choi, Tae Woo Kim