Photographic products and processes employing novel nondiffusible 6-(2-thienylazo)-3-pyridinol cyan dye-releasing compounds and precursors thereof
US4385104A · kind A · utility
1Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1982 |
| Grant date | May 24, 1983 |
| Priority date | — |
| Expiry date | Feb 12, 2002 |
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-(2-thienylazo)-3-pyridinol cyan dye moiety or precursor thereof, the compound containing: PA1 (a) in the 3-position of the thienylazo moiety a carboxy group, a salt thereof or a hydrolyzable precursor thereof; and PA1 (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.