Photographic material comprising a bicyclic pyrazolotriazole coupler with improved hue
US6787294B1 · kind B1 · utility
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3References
18Claims
0Family size
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Key dates
| Filing date | Jun 24, 2003 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Jun 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3835
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a photographic element comprising a light sensitive silver halide emulsion layer and, having associated with that layer, a 1H-pyrazo[1,5-b]-1,2,4-triazole dye forming coupler having a fully substituted carbon atom at the 6-position, a chloro group at the 7-position, and, at the 2-position, a propionic ester moiety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.