Photographic dye-forming coupler, emulsion layer, element, and process
US5681690A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1996 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Mar 27, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/03517
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a photographic light sensitive silver halide emulsion layer having associated therewith a phenolic dye-forming coupler having the formula: ##STR1## wherein: R.sup.1 and R.sup.2 are independently selected from hydrogen and alkyl or aryl groups; PA1 R.sup.3 is a substituent group containing .beta. to the carbonyl carbon of the coupler nucleus the group --S(O).sub.n -- where n is 0 to 2; PA1 R.sup.4 is an aliphatic or aromatic group containing fluoride; PA1 R.sup.5 is hydrogen or a substituent group; and PA1 Z is hydrogen or a coupling-off group. The invention also provides a coupler compound, a photographic element containing the emulsion layer of the invention, and an imaging process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.