Patents Examined by P. S. Thibodeau
  • Patent number: 4047804
    Abstract: Transparent elements useful as supports for photographic image-carrying and/or image-recording layers are provided comprising a polymeric film base having an anti-reflection coating on one surface. Image-carrying and/or image-recording layers may be coated on the opposed surface. Such transparent supports are particularly useful in photographic products wherein the final image is formed by multicolor diffusion transfer processes using dye developers or other image dye-providing materials. In the preferred embodiments, the photographic image is an integral negative-positive reflection print. Where photoexposure is effected through a transparent support, e.g., the transparent support through which the final image is viewed, provision of an anti-reflection coating on said support and effecting photo-exposure therethrough will permit more effective recording of light passing through the camera lens.The polymeric film base of the transparent element has an index of refraction of at least 1.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: September 13, 1977
    Assignee: Polaroid Corporation
    Inventor: Robert K. Stephens