Patents by Inventor Ernest E. Doerschuk, III

Ernest E. Doerschuk, III 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).

  • Method for making etch-resistant stencil with dichromate-sensitized alkali-caseinate coating
    Patent number: 4230781
    Abstract: Method comprises applying to a surface to be etched a coating of a liquid composition having a pH of about 5.8 to 7.0 and comprising an alkali caseinate, an alkali dichromate photosensitizer, sodium borate and water. The layer is dried, photoexposed, developed and baked to produce an etch-resistant stencil.
    Type: Grant
    Filed: February 19, 1976
    Date of Patent: October 28, 1980
    Assignee: RCA Corporation
    Inventors: Joseph J. Piascinski, Ernest E. Doerschuk, III