Photographic emulsions containing methine dyes having a 1H-imidazo[4,5-b]pyrazine nucleus
US4007170A · kind A · utility
1Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1974 |
| Grant date | Feb 8, 1977 |
| Priority date | — |
| Expiry date | Jun 26, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Light-sensitive photographic emulsions are provided which feature at least one methine dye containing a silver halide sensitizing 1H-imidazo[4,5-b]pyrazine nucleus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.