Cellulose Or Derivative, E.g., Regenerated Cellulose, Etc. Patents and Patent Applications (Class 430/641) - Justia Patents Search

Cellulose Or Derivative, E.g., Regenerated Cellulose, Etc. Patents (Class 430/641)

Graft copolymers as diffusion control layers in photographic diffusion transfer products

Patent number: 4201587

Abstract: A .beta.-eliminating graft copolymer useful as a diffusion control layer in film units adapted for diffusion transfer processes is disclosed.

Type: Grant

Filed: September 15, 1978

Date of Patent: May 6, 1980

Assignee: Polaroid Corporation

Inventors: Stanley F. Bedell, Charles I. Sullivan, Lloyd D. Taylor

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