Color photographic element containing coupler useful for forming neutral silver-based image
US6458521B1 · kind B1 · utility
4Cited by
9References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2000 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Dec 15, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/156
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a color photographic element that contains a coupler useful for forming a neutral silver-based image. Such couplers are particularly useful to provide an auxiliary silver-based image for optically recording a sound track in color motion picture films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.