2-hydroxy ethyl benzyl pyridinium compounds
US4677206A · kind A · utility
0Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1986 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Feb 20, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is described a photographic system wherein development of an exposed photosensitive element with an aqueous alkaline photographic developing composition is effected in the presence of a compound which releases a quaternary in alkaline environment. Photographic products and processes utilizing such compounds are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.