Patents by Inventor Doo Young Chang

Doo Young Chang 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).

  • Self-supporting type pneumatic run-flat tire, and insert and bead rubber composition for run-flat capability
    Publication number: 20070006956
    Abstract: A self-supporting type pneumatic run-flat tire is optimized in location and gauge of insert rubber at sidewalls, thereby enhancing run-flat and expansion capabilities. The self-supporting type pneumatic run-flat tire comprises an insert and bead rubber composition which comprises syndiotactic 1,2-polybutadiene in order to enhance run-flat capability.
    Type: Application
    Filed: June 20, 2006
    Publication date: January 11, 2007
    Applicant: HANKOOK TIRE CO. LTD.
    Inventors: Jong Bok Park, Doo Young Chang