Chromogenic black-and-white motion picture film
US5491053A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1994 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | Dec 23, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3225
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a photographic element comprising a Formula I class yellow coupler comprising ##STR1## wherein R.sub.1 represents a substituent; PA1 X is hydrogen or a coupling-off group; PA1 Y represents an aryl group or a heterocyclic group; PA1 a Formula II class cyan coupler comprising ##STR2## wherein R.sub.2 represents a substituent; PA1 R.sub.3 represents a substituent; PA1 X represents a hydrogen or a coupling-off group; PA1 m is from 1-3; and PA1 a Formula III class magenta coupler comprising ##STR3## wherein R.sub.4 is a substituent; PA1 R.sub.5 is a substituent; PA1 X is hydrogen or a coupling-off group; PA0 and which provides a relative fixed upper scale contrast between 1.1 and 1.8. An alternative form of the invention relates to a photographic element comprising a Formula I class yellow coupler comprising ##STR4## wherein R.sub.1 represents a substituent; PA1 X is hydrogen or a coupling-off group; PA1 Y represents an aryl group or a heterocyclic group; PA1 a Formula IV class cyan coupler comprising ##STR5## wherein R.sub.6 represents a ballast substituent; PA1 R.sub.7 represents a substituent; PA1 X represents a hydrogen or a coupling-off group; PA1 a Formula…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.