Photographic element, compound, and process
US6562558B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Dec 6, 2021 |
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): 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;X is selected from O, NR* or S and R* is an alkyl, carbocyclic or heterocyclic group;L is a linking group and a is 0 or 1;Y is H or a coupling-off group;Z* is a substituent group and p is 0 to 2; andR1 and R2 are independently selected H or substituents;provided that the combined sum of the aliphatic carbon atoms in R1, R2, R*, L and all Z* is at least 8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.