Photographic element, compound, and process
US6194132A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Dec 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3212
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a cyan coupler having the formula: ##STR1## wherein: PA1 V is a sulfone or sulfoxide containing group; PA1 Y is H or a coupling-off group; PA1 W.sup.2 represents the atoms necessary to complete a carbocyclic or heterocyclic ring group; PA1 each Z", Z* and Z.sup.# is an independently selected substituent group where n and r are independently 0 to 4 and p is 0 to 2; and PA1 X is a halogen atom, and s is 1 to 5; PA1 provided that the combined sum of the aliphatic carbon atoms in V, all Z", all Z.sup.#, and all Z* is at least 8. The element exhibits improved cyan dye stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.