Near infrared antihalation dyes
US5245045A · kind A · utility
2Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1990 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Apr 27, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B23/0075
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compounds suitable for use as antihalation or acutance dyes in silver halide photographic emulsions having a nucleus of the general formula (I), ##STR1## in which: Y and Z independently represent the non-metallic atoms necessary to complete a carbocyclic or heterocyclic ring or a fused ring system, PA1 M.sup..sym. is a cation, and, PA1 X represents the non-metallic atoms necessary to complete a 5-, 6- or 7- membered carbocyclic ring, a 5-,6- or 7- membered heterocyclic ring or a fused ring system on a 5-, 6- or 7- membered nucleus and comprising up to 14 total ring atoms selected from C,N, 0, S and Se.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.