Photographic element containing nitrogen heterocycle substituted cyan coupler and process
US6190852A · kind A · utility
2Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Dec 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/33
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a cyan dye-forming coupler represented by Formula (I): ##STR1## wherein: PA1 each R.sup.1 and R.sup.3 is an independently selected substituent, m is 0 to 5, and p is 0 to 2; PA1 X is hydrogen or a coupling-off group; PA1 W and W.sup.2 represent the atoms necessary to complete rings; and PA1 R.sup.2 is an alkyl or aryl group. The element provides desirable hue properties and ease of synthesis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.