Photographic element containing cylacetamido yellow dye-forming couplers
US5998106A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Apr 29, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/33
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a photographic element comprising a silver halide emulsion layer having associated therewith a 3-indoloylacetanilide yellow dye-forming 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; and n is 1, 2 or 3; PA1 R.sub.4 is a hydrogen atom or an alkyl group: PA1 R.sub.5 is a hydrogen atom or an alkyl group; and 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.