Photographic speed increasing and latent image stabilizing compounds
Photographic silver halide emulsions show increased speed and reduced latent image fading when a compound of the following structure is incorporated: ##STR1## wherein: X is ##STR2## Y.sup.1 and Y.sup.2 individually represent hydrogen or an aromatic nucleus or together represent the atoms completing a fused aromatic nucleus;Z is ##STR3## R is hydrogen or lower alkyl of from 1 to 5 carbon atoms; and R.sup.1 is hydrogen or methyl.
Description
Patent History
Patent number: T104903
Type: Grant
Filed: Feb 7, 1984
Date of Patent: Dec 4, 1984
Inventors: Roger Lok (Rochester, NY), John P. Freeman (Rochester, NY), William H. Baum (Rochester, NY)
Application Number: 6/577,934
Type: Grant
Filed: Feb 7, 1984
Date of Patent: Dec 4, 1984
Inventors: Roger Lok (Rochester, NY), John P. Freeman (Rochester, NY), William H. Baum (Rochester, NY)
Application Number: 6/577,934
Classifications
Current U.S. Class:
260/239R;
The Five-membered Hetero Ring Contains Ring Selenium And Is One Of The Cyclos In A Polycyclo Ring System (548/120);
Nitrogen Attached Directly To The Thiazole Ring By Nonionic Bonding (548/190);
Plural Double Bonds Between Ring Members Of Thiazole Ring (548/202);
Polycyclo Ring System Having The Oxazole Ring As One Of The Cyclos (548/217);
Nitrogen Bonded Directly At The 2-position Of The Oxazole Ring (548/222);
Nitrogen Bonded Directly To Ring Carbon Of The Oxazole Ring (548/233);
548/323;
548/337;
548/342
International Classification: C07D51500; C07D23330;
International Classification: C07D51500; C07D23330;
