Silver halide photographic emulsion
US5965344A · kind A · utility
2Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1998 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | Feb 9, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/03
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide emulsion is disclosed, comprising tabular grains containing not less than 50 mol % bromide, having two parallel (111) major faces and an aspect ratio of 2 or more, and accounting for at least 50% of the total grain projected area; the tabular grains each comprising regions different in iodide concentrations, wherein one of the regions is a central region containing high iodide and a second of the regions is an annular band containing less iodide than the iodide concentration of the central region, and the annular band accounting for less than 5% of each major face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.