Cyan dye-forming couplers and photographic materials containing same
US4849328A · kind A · utility
21Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1988 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Feb 25, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/30523
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel phenolic cyan dye-forming couplers are disclosed. The coupler compounds contain a p-cyanophenylureido group in the 2- position and an acylamino group in the 5- position of the phenolic ring. The acylamino group contains bulky substituents to provide steric interaction within the coupler molecule as well as within the dye molecule derived therefrom. The coupler compounds are useful in photographic recording materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.