Silver halide complexing agents of sulfones, nitriles, and onium salts
US4367279A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1974 |
| Grant date | Jan 4, 1983 |
| Priority date | — |
| Expiry date | Sep 6, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/383
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Certain organic, carbon acid silver halide complexing agents in a photographic diffusion transfer system provide suitable replacement for conventional silver halide complexing agents. Such organic, silver halide complexing agents include certain sulfones, nitriles and onium salts. These are especially useful in a silver salt diffusion transfer system. They can be employed with silver halide developing agents, such as in a monobath, and are especially suitable with a hydroxylamine silver halide developing agent. Other addenda commonly employed in photographic diffusion transfer systems can be employed in combination with these silver halide complexing agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.