Cyan dye-forming couplers and photographic materials containing same
US4753871A · kind A · utility
1Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1986 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Dec 12, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/30523
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Novel phenolic cyan dye-forming couplers contain a p-cyanophenylureido group in the 2-position and in the 5-position an acylamino group containing bulky alicyclic or heterocyclic substituents sufficient to provide steric interaction within the coupler molecule and the dye molecule derived therefrom. The couplers are useful in photographic emulsions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.