Photographic element containing a yellow DIR coupler
US6004737A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1997 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Jul 18, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/158
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic element comprises a support bearing at least one silver halide emulsion and at least one acylacetanilide yellow dye-forming DIR coupler of structure I, below ##STR1## wherein: the R.sub.1 is a tertiary alkyl group or a phenyl group; PA1 X is a halogen atom, an alkoxy group or an alkyl group; PA1 R.sub.2 is one or more substituent in the para position or either meta position relative to the anilino nitrogen and individually selected from the group consisting of halogen atoms, and alkyl, phenyl, alkoxycarbonyl, aryloxycarbonyl, sulfonamido, sulfamoyl, sulfonate, alkylsulfonyl, arylsulfonyl, sulfoxyl, acyloxy, carbamoyl, acyl, carbonamido and cyano groups; PA1 n is 1, 2 or 3; PA1 R.sub.3 is an alkyl group having at least 6 carbon atoms or a phenyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.