Color photographic element containing coupler moiety with improved amino acid timing group
US6780573B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2003 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | May 30, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/156
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a color silver halide photographic element comprising a light-sensitive silver halide emulsion layer, said silver halide emulsion being in reactive association with an amino acid compound according to Formula (I): wherein:COUP is a moiety that reacts with oxidized developer to release the amino acid timing group but does not substantially contribute any density in the visible region to the element after processing is complete;n is 0 or 1;R1 is an alkyl or alkenyl group of 4 carbon atoms or more or an aryl group with 10 carbon atoms or more;R2 is an alkyl or aryl group so the sum total of carbon atoms in R1 and R2 together are at least 5; andPUG is a photographically useful group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.