Silver halide photosensitive material containing a compound capable of releasing a photographically useful group
US4740453A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1985 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Dec 24, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide photosensitive material is described, comprising a support and at least one silver halide emulsion layer, wherein said emulsion layer or another layer contains a compound represented by formula (I) ##STR1## wherein X represents an atomic group forming a redox center of benzene type having substituents by linking with C.sub.A and C.sub.B, and which does not enable Time-PUG to be released until the redox center is oxidized during development processing; EWG represents an electron withdrawing group having a Hammet's .sigma. para value exceeding 0.3; C.sub.A and C.sub.B each represents a carbon atom; R.sub.1 and R.sub.2 each represents a hydrogen atom or a suitable substituent; Time represents a timing group connecting to C.sub.B through a sulfur, nitrogen, or selenium atom thereof, t is an integer of 0 or 1, and when t=0, Time is a chemical bond; PUG represents a photographically useful group and connects to C.sub.B through a sulfur, nitrogen, or selenium atom thereof when t=0; and n is an integer of 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.