Photographic emulsions containing internally and externally modified silver halide grains
US5252451A · kind A · utility
9Cited by
14References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1993 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Jan 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a photographic emulsion comprising silver halide grains, a dopant, and a grain surface modifier. The dopant is a transition metal selected from Group VIII of the periodic table. The grain surface modifier is characterized in that it comprises a transition metal complex having nitrosyl or thionitrosyl ligands with a transition metal selected from Groups V to X of the periodic table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.