Color photographic element
US6511796B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2001 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | May 21, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/156
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a multilayer silver halide color photographic element comprising a support having coated thereon at least two red-sensitive silver halide emulsion layers having different sensitivity to red light, characterized in that the most sensitive of said red-sensitive silver halide emulsion layers comprises a core-shell silver bromoiodide tabular emulsion having a pure bromide core, a total silver iodide content lower than 10% and an aspect ratio higher than 4.0 and a Speed Enhancing (SE) cyan coupler represented by one of the following general formulas: wherein A represents (TIME)n—S—R1—R2, TIME being a timing group releasing S—R1—R2 with delay under developing conditions; n represents 0 or 1; R1 is a divalent linking group and R2 represents a water-solubilizing group or —NR3—R4, wherein R3 and R4, which may be the same or different, each represents a hydrogen atom or an aliphatic group having from 1 to 3 carbon atoms; R5 and R9 represent a non-diffusible ballasting group, R6 represents a group capable of substituting a hydrogen atom of the naphthol ring, m represents 0 to 3, R7 represents hydrogen or a halogen atom, R8 repre…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.