Photographic element containing acetamido DIR coupler
US5994038A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Apr 29, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3022
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a photographic element, comprising a support bearing at least one silver halide emulsion and at least one 3-indoloylacetanilide yellow dye-forming DIR coupler of structure I, below: ##STR1## wherein: R.sub.1 is an alkyl or phenyl group; PA1 R.sub.2 is a phenyl, t-butyl, cyclohexyl or naphthyl group; PA1 X is a halogen atom or an alkoxy or alkyl group; PA1 each R.sub.3 is in the para position or either meta position relative to the anilino nitrogen and is individually selected from the group consisting of halogen atoms, and alkyl, phenyl, alkoxy, phenoxy, carbamoyl, sulfamoyl, carbonamido, sulfonamido, alkylsulfonyl, arylsulfonyl, alkoxycarbonyl, aryloxycarbonyl, acyloxy, sulfoxyl, sulfonyloxy, alkylthio, acyl and cyano groups; PA1 n is 1, 2 or 3; PA1 R.sub.4 contains at least two carbon atoms and is an alkylthio group or a carbonamido group represented by --NHCOR.sub.5, wherein R.sub.5 contains at least four carbon atoms and is an alkyl, phenyl, alkoxy or phenoxy group; PA1 each R.sub.6 is individually a halogen atom, an alkyl group or an alkoxy group and m is 0-4; PA1 provided that substituents may join to form a ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.