Patents Represented by Attorney James N. Hunter

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  • Colorless films formed from fluorinated polyimides
    Patent number: 5049649
    Abstract: A colorless, optically clear film consisting essentially of a polyimide of the formula: ##STR1## wherein R is ##STR2## is disclosed. The composition forming the film has a weight average molecular weight, M.sub.w of at least 75,000, and has as an essential characteristic at least about 80% optical transmission at electromagnetic wavelengths of 400 nanometers and above when formed into a thickness of about two thousandths of an inch.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: September 17, 1991
    Assignee: Hoechst Celanese Corp.
    Inventor: H. Vora Rohitkumar