Silver halide photographic material
US4615970A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1984 |
| Grant date | Oct 7, 1986 |
| Priority date | — |
| Expiry date | Dec 6, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/34
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A silver halide photographic material containing at least one of compounds represented by formula (I) and salts thereof in at least one hydrophilic colloidal layer of the silver halide photographic material gives photographic images having stable and excellent quality without being accompanied by the increased formation of fog and increased changes of sensitivity and gradation upon high temperature processing: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic ring group; or one or both of said R.sub.1 and R.sub.2 and said R.sub.3 and R.sub.4 combine with each other to form a ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.