Patents Examined by Richard Treaner
  • Modified block copolymers
    Patent number: H790
    Abstract: The present invention relates to a thermally stable modified selectively hydrogenated alkenyl arene/conjugated diene copolymer wherein a primary or secondary amine functional group is grafted to the block copolymer primarily in the alkenyl arene blocks thereof.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: June 5, 1990
    Inventors: William P. Gergen, Robert G. Lutz, Carl L. Willis