Photographic elements containing removable couplers
US5118594A · kind A · utility
2Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1991 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Apr 29, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to novel photographic dye-forming coupler compounds which are non-diffusible as incorporated in a photographic element, but which, during processing, are converted to a form which is removable from the element if the coupler compound has not reacted with oxidized silver halide color developing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.