ROBERT K STEPHENS
Broker in Windham, NH

4047804, Sep 13, 1977

Nov 29, 1974

5/528236

Robert K. Stephens - Windham NH

Polaroid Corporation - Cambridge MA

B32B 702, B32B 2700

350164

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. 6, and the anti-reflection coating comprises a fluorinated polymer and has an optical thickness of a quarter wave.

4139382, Feb 13, 1979

Dec 27, 1977

5/864596

Robert K. Stephens - Windham NH

Polaroid Corporation - Cambridge MA

G03C 724, G03C 700, G03C 514, G11B 724

96 3

A photographic sound recording and reproduction method is disclosed wherein a sound track is formed by silver diffusion transfer processing. Film units suitable for this application are described which comprise a support, a layer containing silver precipitating nuclei, and a layer containing photosensitive silver halide crystals. In one embodiment, a photographic sound track may be produced in a silver diffusion transfer color motion picture film unit, which further comprises an optical color screen.

4710426, Dec 1, 1987

Nov 28, 1983

6/555520

Robert K. Stephens - Windham NH

Polaroid Corporation, Patent Dept. - Cambridge MA

B32B 1508, B32B 2706, B32B 2736

428336

Radiation-control sheet materials are disclosed, these materials including a transparent support material, an infrared radiation-reflecting layer and a protective polymeric layer therefor substantially transmissive of infrared radiation and having therein or in a layer contiguous thereto an adhesion-promoting isocyanate. The protective polymer layer provides anti-abrasion and anti-corrosion protection and is effectively bonded by the adhesion-promoting isocyanate.