Photographic element, compound, and process
US6180331A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Dec 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/346
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a cyan "NB coupler" having the formula (I): ##STR1## wherein: the term "NB coupler" represents a coupler of formula (I) that forms a dye for which the left bandwidth (LBW) using spin-coating is at least 5 nm less than that of the same dye in solution form; Y is H or a coupling-off group; each Z" and Z* is an independently selected substituent group where n is 1 to 4 and p is 0 to 2; W.sup.2 represents the atoms necessary to complete a carbocyclic ring group; and V is a substituent containing a heterocyclic sulfone or sulfoxide group; provided that the combined sum of the aliphatic carbon atoms in V, all Z" and all Z* is at least 8. The element exhibits improved cyan dye hue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.