Silver halide emulsions containing latent image stabilizing compounds
US4374196A · kind A · utility
11Cited by
6References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1981 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Feb 20, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/346
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photographic silver halide emulsions are protected against latent image fading by latent image stabilizing compounds having the structure: ##STR1## wherein: R.sup.1 is hydrogen, alkyl, or aryl; PA0 R.sup.2 and R.sup.3 are each individually hydrogen, alkyl, alkoxy, carboxy, alkoxycarbonyl, or aminocarbonyl; PA0 R.sup.4 and R.sup.5 are each individually hydrogen, alkyl, aryl, cyano, halogen, formyl, carboxy, alkoxycarbonyl, aryloxycarbonyl or aminocarbonyl; PA0 n is an integer of 1 or 2; and PA0 M.sup..sym.n is a cation of valence n.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.