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Acylhydrazinophenylthiourea nucleating agents and photographic emulsions and elements containing such agents
T997004 Acylhydrazinophenylthiourea nucleating agents and photographic emulsions and elements containing such agents
Patent Drawings:

Inventor: Leone
Date Issued: August 5, 1980
Application: 06/105,317
Filed: December 19, 1979
Inventors: Leone; Ronald E. (Rochester, NY)
Primary Examiner:
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 430/378; 430/548; 546/225; 564/27
Field Of Search:
International Class: G03C 1/485
U.S Patent Documents:
Foreign Patent Documents:
Other References:

Abstract: Novel 3,3-disubstituted acylhydrazinophenylthiourea nucleating agents are disclosed as well as silver halide photographic emulsions and elements containing silver halide grains capable of forming an internal latent image having the nucleating agents adsorbed to the surface of the silver halide grains. Imaging processes in which these materials participate are also disclosed.
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