Photographic products and processes employing novel nondiffusible 6-arylazo-3-pyridinol magenta dye-releasing compounds and precursors thereof
US4287292A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1980 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Aug 1, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photographic elements, diffusion transfer assemblages and processes are described which employ a novel nondiffusible compound having a releasable 6-arylazo-3-pyridinol magenta dye moiety or precursor thereof having the formula: ##STR1## wherein: (a) R represents hydroxy or amino; PA1 (b) R.sup.1 represents hydrogen, a hydrolyzable moiety or CAR; PA1 (c) G represents carboxy; a hydrolyzable ester or a sulfamoyl group; PA1 (d) CAR represents a ballasted carrier moiety capable of releasing the diffusible 6-arylazo-3-pyridinol dye moiety or precursor thereof under alkaline conditions; and PA1 (e) n is 0, 1 or 2, with the proviso that when n is 0, then R.sup.1 is CAR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.