Silver halide imaging materials
US5800974A · kind A · utility
5Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1992 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Sep 8, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/42
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A black and white photographic element comprising as a photosensitive medium a layer of a silver halide emulsion characterised in that the photosensitive medium comprises in the same layer or in an adjacent layer thereto a developer comprising a substantially non-diffusing polymeric compound having as a component part of its structure a plurality of units having a nucleus of general formula (I): ##STR1## wherein; each Z independently is a member selected from the group consisting of --OH and a group which leaves an --OH residue when contacted with an alkali (pH .gtoreq.10) at temperatures of .ltoreq.50.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.