Patents by Inventor Chang-ae Cho

Chang-ae Cho 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).

  • Branched and sulphonated multi block copolymer and electrolyte membrane using the same
    Patent number: 7807759
    Abstract: The present invention relates to a branched and sulphonated multi block copolymer and an electrolyte membrane using the same, more precisely, a branched and sulphonated multi block copolymer composed of the repeating unit represented by formula 1 and a preparation method thereof, a hydrogenated branched and sulphonated multi block copolymer, a branched and sulphonated multi block copolymer electrolyte membrane and a fuel cell to which the branched and sulphonated multi block copolymer electrolyte membrane is applied. The electrolyte membrane of the present invention has high proton conductivity and excellent mechanical properties as well as chemical stability, so it can be effectively used for the production of thin film without the decrease of membrane properties according to the increase of sulfonic acid group since it enables the regulation of the distribution, the location and the number of sulfonic acid group in polymer backbone.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: October 5, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Chong-kyu Shin, Young-ji Tae, Jae-hyuk Chang, Bong-keun Lee, Chang-ae Cho, Sang-hyun Lee, Hwang-chan Yoo, Go-young Moon
  • Branched and sulphonated multi block copolymer and electrolyte membrane using the same
    Publication number: 20060134494
    Abstract: The present invention relates to a branched and sulphonated multi block copolymer and an electrolyte membrane using the same, more precisely, a branched and sulphonated multi block copolymer composed of the repeating unit represented by formula 1 and a preparation method thereof, a hydrogenated branched and sulphonated multi block copolymer, a branched and sulphonated multi block copolymer electrolyte membrane and a fuel cell to which the branched and sulphonated multi block copolymer electrolyte membrane is applied. The electrolyte membrane of the present invention has high proton conductivity and excellent mechanical properties as well as chemical stability, so it can be effectively used for the production of thin film without the decrease of membrane properties according to the increase of sulfonic acid group since it enables the regulation of the distribution, the location and the number of sulfonic acid group in polymer backbone.
    Type: Application
    Filed: November 21, 2005
    Publication date: June 22, 2006
    Inventors: Chong-kyu Shin, Young-ji Tae, Jae-hyuk Chang, Bong-Keun Lee, Chang-ae Cho, Sang-hyun Lee, Hwang-chan Yoo, Go-young Moon