Photographic elements containing removable filter dye
US5158865A · kind A · utility
2Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1990 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Dec 20, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Novel photographic filter dyes are immobile as incorporated in a photographic element, but during processing, are uniformly converted to a form which is removable from the element. 2 The filter dye is represented by the structure: EQU DYE--LS--BAL where: PA0 BAL is a ballast group; PA0 DYE is a filter dye moiety; PA0 LS is a splittable linking group attached to a position in DYE that is not in conjugation with the dye chromophore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.