Silver halide photographic emulsion and a photographic light-sensitive material
US5418124A · kind A · utility
19Cited by
8References
19Claims
0Family size
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Key dates
| Filing date | Mar 19, 1993 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Mar 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/0357
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide photographic emulsion, in which silver halide grains have been formed while iodide ions are rapidly being generated in a reactor vessel to form a silver iodide-containing region in the silver halide grains, and the silver halide grains have been spectrally sensitized by a sensitizing dye represented by the following formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2.sup.- represent non-metallic atom group which form a 5- or 6-membered heterocyclic ring having nitrogen atom and carbon atom in the ring, R.sub.3 and R.sub.4 represent alkyl groups, X.sub.1.sup.- represents an anion, and p represents 1 or 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.