Photographic system with salt of phenylmercaptoazole and quaternary radical
US4543317A · kind A · utility
6Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1984 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | Dec 19, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/158
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is described a photographic system wherein development of an exposed photosensitive element with an aqueous alkaline processing composition is effected in the presence of a compound which is a salt of a radical of a substituted phenylmercaptoazole complexed with a radical of a quaternary. The salts are either insoluble or have extremely low solubility in water and become soluble, and photographically active, in alkaline environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.