Patents by Inventor Kevin M. Rapp

Kevin M. Rapp 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 a stencil with a borax-free, low-dichromate, casein photoresist composition
    Patent number: 4865953
    Abstract: The method comprises applying to a surface to be etched a coating of a borax-free, low dichromate, casein photoresist liquid composition comprising an acid-precipitated casein, sodium hydroxide as an alkalizing agent, an alkali dichromate photosensitizer and water. The composition has a pH in the range of 6.0 to 7.0, and reduced quantities of the alkalizing agent and photosensitizer compared to prior coating compositions.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: September 12, 1989
    Assignee: RCA Licensing Corp.
    Inventors: Peter M. Ritt, Kevin M. Rapp, Kenneth G. Minnerly