Patents by Inventor Youn S. Don

Youn S. Don 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).

  • Melt processable etherimideimide/etherimide copolymer
    Patent number: 5569738
    Abstract: This invention relates to melt processable copolymer of etherimideimide/etherimide herein-after identified as PEII/PEI copolymer of following structural formula(I). ##STR1## wherein, R and R' are independently selected from the groups of ##STR2## Ar and Ar' are independently selected from the groups of ##STR3## (wherein, R1 is H or C1-C6 alkyl group,R2 is II or C1-C4 alkyl group, andR3 is --O--, --CO--, --SO--, --SO2--.); andn and m are independently an integer between 5 and 500.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: October 29, 1996
    Assignees: Korea Research Institute of Chemical Technology, Cheil Industries, Inc.
    Inventors: Kil Y. Choi, Jong C. Won, Young T. Hong, Sang S. Woo, Youn S. Don