Cyan dye-forming couplers and photographic materials containing same
US4775616A · kind A · utility
26Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1986 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Dec 12, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/30523
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel phenolic cyan dye-forming couplers contain a p-cyanophenylureido group in the 2-position and in the 5-position an acylamino substituent containing a sulfone group having bulky 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.