Patents Represented by Law Firm Lynch, Cox, Guman & Mahan
  • Ultrathin polyimide polymer flims and their preparation
    Patent number: 4929405
    Abstract: Disclosed herein are free-standing, pinhole-free, ultrathin polymide films having thicknesses of about 400 angstroms or less and a process to prepare them. The films find particular utility in separatory applications.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: May 29, 1990
    Assignee: Hoechst Celanese Corp.
    Inventor: Rachel S. Kohn