Photographic element and process
US4892805A · kind A · utility
0Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Oct 31, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3835
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Novel pyrazoloazole dye-forming couplers containing at least one polyether group (A) comprising at least three ether (--O--) groups and terminated by a hydroxy, carboxy or sulfonamido group enables increased reactivity of the coupler in a photographic element and process. The couplers are useful in color photographic silver halide materials and processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.