Photographic products and processes employing substituted sulfonamidophenol or sulfonamidonaphthol dye-releasers
US4407930A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1982 |
| Grant date | Oct 4, 1983 |
| Priority date | — |
| Expiry date | May 21, 2002 |
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 nondiffusible, redox, dye-releasing compound comprising a ballasted, sulfonamidophenol or sulfonamidonaphthol compound having a dye moiety attached thereto through the sulfonamido group of the compound, the sulfonamido group being located in a position which is conjugated with respect to the position of the hydroxy group of the compound, and wherein PA1 (a) the compound has at least one substituent thereon in a position which is conjugated with respect to the position of the sulfonamido group, the substituent being selected from the group consisting of hydroxy, sulfonamido, phosphonamido and carbonamido, and PA1 (b) the compound not having a hydroxy, alkoxy, aryloxy, sulfonamido, phosphonamido or carbonamido group thereon in a position which is conjugated with respect to the position of the hydroxy group of the compound, PA2 with the proviso that when the compound is a 2-sulfonamidophenol and has only one substituent thereon in a position which is conjugated with respect to the position of the sulfonamido group, then that one substituent is located in the 5-position. These dye-releasers…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.