Photographic products and processes employing novel nondiffusible 6-(2-thienylazo)-3-pyridinol cyan dye-releasing compounds and precursors thereof
US4346161A · kind A · utility
5Cited by
3References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1981 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Apr 29, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Photographic elements, diffusion transfer assemblages and processes are described which employ a novel nondiffusible compound having a releasable 6-(2-thienylazo)-3-pyridinol cyan dye moiety or precursor thereof, the compound containing: PA0 (a) in the 3-position of the thienylazo moiety a carboxy group, a salt thereof or a hydrolyzable precursor thereof; and PA0 (b) a ballasted carrier moiety which is capable of releasing the diffusible 6-(2-thienylazo)-3-pyridinol dye moiety or precursor thereof under alkaline conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.