Patents by Inventor Cramer C. Hegeman

Cramer C. Hegeman 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).

  • Pellicle packaging and handling system
    Patent number: 5042655
    Abstract: A pellicle packaging and handling system include a pellicle having a transparent pellicle film extending across a peripheral pellicle frame. A pellicle holder releasably grips the pellicle frame to form a holder/pellicle assembly, the pellicle holder being graspable to handle the holder/pellicle assembly and release the pellicle from the holder. The selectively openable enclosure houses the holder/pellicle assembly with the holder/pellicle assembly releasably retained in a fixed position within the enclosure.
    Type: Grant
    Filed: September 27, 1989
    Date of Patent: August 27, 1991
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: David A. Beldyk, Cramer C. Hegeman