Photographic silver halide element containing infrared filter dyes
US4933269A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Nov 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/145
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A infrared absorbing filter dye that also imparts a cool image tone after processing is disclosed for use in photographic elements. The dye has the formula: ##STR1## where Z and Z' each independently represents the atoms necessary to complete a substituted or unsubstituted: thiazole nucleus, selenazole nucleus, indole nucleus, imidazole nucleus, or quinoline nucleus, R.sub.1 and R.sub.2 each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, Z" represents the atoms necessary to complete a substituted or unsubstituted heterocyclic ring, Q represents the atoms necessary to complete a substituted or unsubstituted carbocyclic ring, m and n each independently represents 0 or 1, and X represents a counterion as needed to balance the charge of the molecule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.