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Photographic speed increasing and latent image stabilizing compounds |
| T104903 |
Photographic speed increasing and latent image stabilizing compounds
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| Inventor: |
Lok, et al. |
| Date Issued: |
December 4, 1984 |
| Application: |
06/577,934 |
| Filed: |
February 7, 1984 |
| Inventors: |
Baum; William H. (Rochester, NY)
Freeman; John P. (Rochester, NY)
Lok; Roger (Rochester, NY)
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| U.S. Class: |
540/1; 548/120; 548/190; 548/202; 548/217; 548/222; 548/233; 548/307.4; 548/309.7; 548/331.5; 548/335.5 |
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| Abstract: |
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. |
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