Photographic elements containing scavengers for oxidized developing agent
US5561036A · kind A · utility
3Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1995 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Mar 30, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved photographic element comprises a support bearing at least one silver halide emulsion layer having associated therewith a hydroquinone compound that functions as a scavenger for oxidized developing agent. The hydroquinone compound has sufficient bulk that it is substantially non-diffusible in the photographic element and has in the two-position thereof an asymmetric tertiary carbamoyl substituent. These scavenger compounds exhibit very high activity, have excellent stability upon long-term storage and do not leave colored residues after processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.