Photographic material comprising a bicyclic pyrazolotriazole coupler with improved photographic properties
US6852480B1 · kind B1 · utility
0Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2003 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | Dec 18, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3835
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a photographic element comprising a light sensitive silver halide emulsion layer and, having associated with that layer a 1H-pyrazolo[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 phenyl ring substituted in the meta position with a carbonamido substituent containing an α-sulfone moiety. Photographic elements containing these couplers exhibit desirable bleach-fix and activity characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.