Patents by Inventor Frederick F. Holub

Frederick F. Holub 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).

  • High heat distortion resistant segment ester polycarbonates
    Patent number: 4380612
    Abstract: Segment-ester polycarbonates have improved resistance to high heat distortion when portions of the polymer contain units derived from 4,4'-cyclohexylidenediphenol and derivatives thereof. Preferred high heat distortion segment-ester polycarbonates include the copolyestercarbonate with segments derived from isophthalic acid and 4,4'-cyclohexylidenediphenol and/or terephthalic acid and 4,4'-cyclohexylidenediphenol. Films made of the segment-ester copolycarbonates have improved resistance to high heat distortion.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: April 19, 1983
    Assignee: General Electric
    Inventors: Victor Mark, Frederick F. Holub, Charles V. Hedges