Photographic element, compound, and process
US6387606B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2001 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3212
- 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): 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 0 to 4 and p is 0 to 2;W2 represents the atoms necessary to complete a heterocyclic ring group; andV is a sulfone or sulfoxide containing 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.