Photographic element containing a particular cyan dye-forming coupler
US5834166A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Oct 31, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a photographic element which comprises a light-sensitive silver halide emulsion layer having associated therewith a cyan dye-forming coupler having the formula: ##STR1## wherein: each R.sub.1 independently represents an alkyl or aryl group; PA1 R.sub.2 represents a linear or branched alkyl group of 1 to 20 carbon atoms; PA1 R.sub.3 is selected from the group consisting of an alkyl group, an aryl group, a perfluoroalkyl group, or an arylamino group; and PA1 Z represents a hydrogen atom or a group capable of being split off by oxidized color developer. The element of the invention exhibits improved cyan dye light stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.