Patents by Inventor Jee Won Choun

Jee Won Choun 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).

  • Proton exchange composite membranes, composite solutions, and method for manufacturing and fuel cell using the same
    Patent number: 7029559
    Abstract: An ion exchange composition membrane is made up of dispersed natural clay and/or organized clay in ion conducting polymeric film as a methanol barrier material. The membrane exhibits low methanol crossover, high proton conductivity and is thus suitable for use in direct methanol fuel cells with low costal advantage.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: April 18, 2006
    Assignee: Korea Institute of Science Technology
    Inventors: Jongok Won, Yong Soo Kang, In-Hwan Oh, Heung Yong Ha, Sangwook Choi, Jee Won Choun, Bum-Suk Jung
  • Inorganic-organic hybrid polymers composed of nano-particles on the surface using dendrimers and manufacturing method thereof
    Patent number: 6590056
    Abstract: Disclosed is an inorganic-organic hybrid polymer composed of nano-particles on the surface using a dendrimer and a manufacturing method thereof, in which nanometer-sized inorganic (metal) particles are uniformly dispersed across the surface of the polymer and available as optically, electrically and magnetically functional materials. The method includes the steps of: forming a functional anhydride group on a polymer-based matrix; selectively adding metal or inorganic salts to the dendrimer to prepare either of dendrimer-metal precursor solution or dendrimer-inorganic particle solution; inducing the reaction between the functional anhydride group of the surface of polymer matrix with the solution to form a chemical bond between the matrix and the dendrimer; and reducing the metal ions or inorganic particle by irradiation of light.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: July 8, 2003
    Assignee: Korea Institute of Science and Technology
    Inventors: Jongok Won, Yong Soo Kang, Bum Suk Jung, Jee Won Choun
  • Proton exchange composite membranes, composite solutions, and method for manufcturing and fuel cell using the same
    Publication number: 20030054219
    Abstract: An ion exchange composition membrane is made up of dispersed natural clay and/or organized clay in ion conducting polymeric film as a methanol barrier material. The membrane exhibits low methanol crossover, high proton conductivity and is thus suitable for use in direct methanol fuel cells with low costal advantage.
    Type: Application
    Filed: August 27, 2002
    Publication date: March 20, 2003
    Inventors: Jongok Won, Yong Soo Kang, In-Hwan Oh, Heung Yong Ha, Sangwook Choi, Jee Won Choun, Bum-Suk Jung
  • Inorganic-organic hybrid polymers composed of nano-particles on the surface using dendrimers and manufacturing method thereof
    Publication number: 20020068795
    Abstract: Disclosed is an inorganic-organic hybrid polymer composed of nano-particles on the surface using a dendrimer and a manufacturing method thereof, in which nanometer-sized inorganic (metal) particles are uniformly dispersed across the surface of the polymer and available as optically, electrically and magnetically functional materials. The method includes the steps of: forming a functional anhydride group on a polymer-based matrix; selectively adding metal or inorganic salts to the dendrimer to prepare either of dendrimer-metal precursor solution or dendrimer-inorganic particle solution; inducing the reaction between the functional anhydride group of the surface of polymer matrix with the solution to form a chemical bond between the matrix and the dendrimer; and reducing the metal ions or inorganic particle by irradiation of light.
    Type: Application
    Filed: May 21, 2001
    Publication date: June 6, 2002
    Inventors: Jongok Won, Yong Soo Kang, Bum Suk Jung, Jee Won Choun