Lucretia J Weed

42476178, Jan 27, 1981

May 11, 1979

6/038313

Frank E. Debruyn - Abington MA
Kenneth G. Scott - Sherborn MA
Lucretia J. Weed - Boston MA

Polaroid Corporation - Cambridge MA

G03C 148

430228

A silver diffusion transfer film unit comprising a transparent support carrying on one surface, in order, a layer comprising silver precipitating nuclei, a photosensitive silver halide emulsion layer and a layer comprising a processing composition permeable polymer layer, a substantially photoinsensitive, water-insoluble inorganic silver salt and a substantially water-insoluble noble metal compound containing a noble metal below silver in the Electromotive Force Series of Elements. In a preferred embodiment the film unit includes an additive color screen.

46908846, Sep 1, 1987

Feb 11, 1986

6/828385

Frank E. DeBruyn - Abington MA
Lucretia J. Weed - Lexington MA

Polaroid Corporation - Cambridge MA

G03C 554
G03C 526
G03C 536
G03C 538

430206

A scavenger-spreader element adapted for use with a photosensitive element to form a negative image is disclosed as well as methods for processing said photosensitive element to produce the negative image. The scavenger-spreader element comprises a support carrying a hydrophilic layer, a cross-linking agent for the polymeric thickener of the photographic processing composition, a barrier layer to control diffusion of said cross-linking agent and a layer adapted to possess substantial adhesion for the cross-linked polymeric thickening agent.