Photographic speed increasing and latent image stabilizing compounds, silver halide emulsions, and photographic elements
US4378426A · kind A · utility
14Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1981 |
| Grant date | Mar 29, 1983 |
| Priority date | — |
| Expiry date | Nov 12, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/34
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 -O-, -S-, -Se-, or ##STR2## Y represents the atoms completing a fused aromatic nucleus; Z is ##STR3## R is hydrogen or lower alkyl of from 1 to 5 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.