Patents by Inventor Ho-Burn Park

Ho-Burn Park 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).

  • Crosslinked sulfonated polyimide films
    Patent number: 7157548
    Abstract: The present invention relates to a new sulfonated polyimides, more specifically to new methods for preparing the polyimides, and cation exchange membranes containing the polyimides. The sulfonated polyimides of the presented invention have excellent proton conductivity and low preparation cost.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: January 2, 2007
    Assignee: Hanyang Hak Won Co., Ltd.
    Inventors: Young-Moo Lee, Ho-Burn Park, Chang-Hyun Lee
  • Crosslinked sulfonated polyimide films
    Publication number: 20040236038
    Abstract: The present invention relates to a new sulfonated polyimides, more specifically to new methods for preparing the polyimides, and cation exchange membranes containing the polyimides. The sulfonated polyimides of the presented invention have excellent proton conductivity and low preparation cost. In particular, the sulfonated polyimides can be used as polymer electrolyte membrane in hydrogen or direct methanol fuel cell for electric vehicles and portable power sources operated with electric energy.
    Type: Application
    Filed: February 17, 2004
    Publication date: November 25, 2004
    Inventors: Young-Moo Lee, Ho-Burn Park, Chang-Hyun Lee