Acylhydrazinophenylthiourea nucleating agents and photographic emulsions and elements containing such agents
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.
Description
Patent History
Patent number: T997004
Type: Grant
Filed: Dec 19, 1979
Date of Patent: Aug 5, 1980
Inventor: Ronald E. Leone (Rochester, NY)
Application Number: 6/105,317
Type: Grant
Filed: Dec 19, 1979
Date of Patent: Aug 5, 1980
Inventor: Ronald E. Leone (Rochester, NY)
Application Number: 6/105,317
Classifications
Current U.S. Class:
Direct Positive Process (430/378);
Fogging Or Nucleating Agent Containing (430/598);
260/465D;
260/552R;
260/3264;
Having -c(=x)-, Wherein X Is Chalcogen, Bonded Directly To The Piperidine Ring (546/225)
International Classification: G03C 524; C07C12160; C07C15709; C07D20724;
International Classification: G03C 524; C07C12160; C07C15709; C07D20724;
