Patents by Inventor Chong-bok Yoon

Chong-bok Yoon 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-conducting polymer with acid groups in side chains, preparation method thereof, polymer membrane manufactured using the polymer, and fuel cell using the polymer membrane
    Patent number: 6955712
    Abstract: A proton-conducting polymer, a preparation method thereof, a polymer membrane manufactured from the proton-conducting polymer, and a fuel cell having the polymer membrane are provided. The proton-conducting polymer contains an acid-bearable aromatic group covalently bonded to its polyimide backbone and a proton-conducting acid group attached to the aromatic group. A polymer membrane manufactured from the proton-conducting polymer has greater mechanical strength and ionic (protonic) conductivity than existing sulfonated polyimide membranes and thus improves the performance of fuel cells. In addition, the proton-conducting polymer membrane is low cost, enabling automobile fuel cells to be commercialized. Since the proton-conducting polymer membrane is less permeable to methanol, it can be used effectively for DMFCs without causing cell performance degradation.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: October 18, 2005
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Chong-bok Yoon
  • Organic electroluminescent device and preparation thereof
    Patent number: 6805976
    Abstract: In the organic electroluminescence (EL) device containing a bis-condensed derivative of 4-(dicyanomethylene)-2-methyl-6-(para-(dimethylaminostyryl)-4H-pyran, and the preparation thereof, the inventive organic electroluminescence device has a high luminescent efficiency and color coordinates based on a high purity, and is further simple in a synthesis and is prominent in a thermal stability, thereby providing great merits to a mass production of the organic electroluminescence device.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: October 19, 2004
    Assignees: Electronics and Telecommunications Research Institute, Korea Advanced Institute of Science and Technology
    Inventors: Lee-Mi Do, Jeong Ik Lee, Hye Yong Chu, Seong Hyun Kim, Tae Hyoung Zyung, Hyo Young Lee, Hong-Ku Shim, Byung-Jun Jung, Chong-Bok Yoon
  • Proton-conducting polymer with acid groups in side chains, preparation method thereof, polymer membrane manufactured using the polymer, and fuel cell using the polymer membrane
    Publication number: 20040097695
    Abstract: A proton-conducting polymer, a preparation method thereof, a polymer membrane manufactured from the proton-conducting polymer, and a fuel cell having the polymer membrane are provided. The proton-conducting polymer contains an acid-bearable aromatic group covalently bonded to its polyimide backbone and a proton-conducting acid group attached to the aromatic group. A polymer membrane manufactured from the proton-conducting polymer has greater mechanical strength and ionic (protonic) conductivity than existing sulfonated polyimide membranes and thus improves the performance of fuel cells. In addition, the proton-conducting polymer membrane is low cost, enabling automobile fuel cells to be commercialized. Since the proton-conducting polymer membrane is less permeable to methanol, it can be used effectively for DMFCs without causing cell performance degradation.
    Type: Application
    Filed: July 2, 2003
    Publication date: May 20, 2004
    Applicant: Samsung SDI Co., Ltd.
    Inventor: Chong-Bok Yoon