Direct positive silver halide photographic emulsions
US4599300A · kind A · utility
4Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1984 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Nov 28, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/4853
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is provided a high speed and high contrast direct positive silver halide photographic emulsion which is free of discoloration by containing therein a dimethine dye having an indolenine ring which contains a cyano group as a substituent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.