Amide substituted dye compounds and silver halide photographic elements containing such dyes
US5316904A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Nov 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dyes and photographic elements containing them as silver halide sensitizing dyes, which dyes have the structure: ##STR1## wherein: X1 and X2 each independently represent the atoms necessary to complete a benzo-condensed 5- or 6-membered heterocyclic nucleus, which, in addition to being substituted by Z1 and Z2 respectively, may be further substituted or unsubstituted; PA0 n is a positive integer from 1 to 4, PA0 p and q each independently represents 0 or 1, PA0 each L independently represents a substituted or unsubstituted methine group, PA0 R1 and R2 each independently represents substituted or unsubstituted aryl or substituted or unsubstituted alkyl, PA0 Z1 represents a substituent which contains both an amide group and an aromatic ring which may be appended or fused to X1; and PA0 W1 is a counterion as needed to balance the charge of the molecule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.