Dye-forming coupler, silver halide photographic light-sensitive material, and method for producing an azomethine dye
US6803181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2002 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Jan 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/38
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A dye-forming coupler of the formula (I). A silver halide photographic light-sensitive material that contains at least one dye-forming coupler of the formula (I). A method for producing an azomethine dye, which method comprises using a compound of the formula (I): wherein E is an aryl, heterocyclic, or —C(═O)W group, in which W is a nitrogen-containing heterocyclic group, Z is an aryl or heterocyclic group, and X and Y each independently are ═O, ═S or ═N—R, in which R is a substituent, with the proviso that when E is an aryl or heterocyclic group, X and Y each are ═O, and that when E is a —C(═O)W group, Z is a substituted aryl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.