Patents by Inventor Robert Risner

Robert Risner 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).

  • Solar photo-developing process
    Patent number: 4857970
    Abstract: A solar reactive device is set forth for imparting images on light sensitive paper. Light sensitive paper is positioned within an open container whereupon a positive transparency is positioned thereover and finally a plastic-like cover encloses the contents. The container is positioned to receive solar light for a time period, whereupon the plastic-like cover is removed along with the positive transparency. Further utilization of solar light effects clarification of an image imparted via the removed positive transparency.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: August 15, 1989
    Inventors: Joseph Mordini, Robert Risner