Magenta dye-forming coupler
US5116990A · kind A · utility
4Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1990 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Aug 2, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3835
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There are provided 1H-pyrazolo[1,5-b]-1,2,4-triazole magenta couplers or 1H-pyrazolo[5,1-c]-1,2,4-triazole magenta couplers characterized by having at the 6-position a phenoxy group, on the ortho-position of which is an alkoxy group or an aryloxy group. A photographic material comprising the magenta coupler is excellent in color reproducibility and exhibits superior photographic characteristics in any of sensitivity, gradation, and color density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.