Patents by Inventor Vincent Shea

Vincent Shea 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 cover for projection printing system
    Patent number: 4131363
    Abstract: In a projection printing system the pattern mask, whose image is projected onto a light sensitive layer, is protected with a thin, 0.2-6 micron thick, transparent film or pellicle which is positioned an optically large distance of about 1-125 mm from the mask surface by a spacer member. Any dirt particles on the surface of the pellicle will be out of focus and are not printed in the light sensitive layer. A pellicle can also be employed to protect the light sensitive layer at the image plane.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: December 26, 1978
    Assignee: International Business Machines Corporation
    Inventors: Vincent Shea, Walter J. Wojcik