3-anilino pyrazolone magenta couplers and process
US5447830A · kind A · utility
8Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1993 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Jun 25, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3012
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Magenta image-dye couplers provide photographic elements and processes having superior photographic properties. The couplers are 3-anilino pyrazolone couplers having an aryl thio coupling-off group. The substituents of the coupler are specified to obtain advantageous properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.