Patents by Inventor Byoung K. Park

Byoung K. 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).

  • Polyetherimideimides and a method for manufacturing them
    Patent number: 5212277
    Abstract: The present invention relates to new polyetherimideimides having imideimide group with the following structural formula(I) and inherent viscosity of 0.27.about.0.71 dl/g, which can be made by effecting reaction between an aromatic bis(ether anhydride) and an organic diamine or an aromatic bis(nitro imideimide) and a metal salt of diol.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: May 18, 1993
    Assignees: Korea Research Institute of Chemical Technology, Cheil Industries, Inc.
    Inventors: Kwang-Sup Lee, Kil-Yeong Choi, Jong C. Won, Byoung K. Park, In-Tae Lee