Color photographic elements containing yellow colored magenta dye forming masking couplers
US5622818A · kind A · utility
24Cited by
0References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Nov 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3335
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multilayer silver halide color photographic element comprising a support bearing a light-sensitive silver halide emulsion layer and a non-diffusible yellow-colored magenta dye-forming masking coupler wherein the masking coupler is a 2'-hydroxy-5'-substituted-4-phenylazo-5-pyrazolone. The masking coupler has good coupling activity and desirable hues, and can be obtained in good yields by simple syntheses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.