Patents by Inventor Walter J. Wojcik

Walter J. Wojcik 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
  • Closure lid for home canning jar
    Patent number: 4034883
    Abstract: A closure lid for a home canning jar includes a cap member threadably engaging the neck of a canning jar. A flexible dome shaped body extends upwardly through the cap member. A mechanism is provided for forming an airtight seal between the cap and the body. A mechanism is provided for forming an airtight seal between the body and an upper edge of the neck of the jar.
    Type: Grant
    Filed: August 3, 1976
    Date of Patent: July 12, 1977
    Inventor: Walter J. Wojcik