Silver halide photographic materials comprising non-diffusible photographically useful compounds
US4837136A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1986 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Oct 9, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/159
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide photographic material is described comprising a support having coated thereon at least one silver halide emulsion layer, wherein at least one of the silver halide emulsion layer and other hydrophilic colloid layer contains a nondiffusible photographically useful compound having a sulfo group and a group represented by the following general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represents an aliphatic group having at least 2 carbon atoms and r represents 0 or 1. The compounds represented by the general formula (I) are photographically useful compounds which impart excellent photographic properties to silver halide photographic materials, including improved dispersibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.