Photographic emulsions containing internally and externally modified silver halide grains
US5385817A · kind A · utility
5Cited by
15References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1993 |
| Grant date | Jan 31, 1995 |
| Priority date | — |
| Expiry date | Jan 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/0863
- 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 complex comprising a nitrosyl or thionitrosyl ligand with a transition metal selected from the group consisting of ruthenium and osmium. The grain surface modifier is a transition metal selected from Group VIII of the periodic table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.