Silver halide emulsions with incorporated 4,6-difluorophenolic couplers
US3998642A · kind A · utility
6Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1975 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Jul 11, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C205/26
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Color photographic elements are disclosed having, incorporated therein, one or more novel phenolic materials which have the following structure: ##STR1## wherein R.sub.1 is a non-interfering alkyl, aryl, amino, substituted alkyl or substituted aryl ballasting group of the type which is useful in photographic incorporated cyan color-forming couplers, and R.sub.2 is hydrogen or a lower alkyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.