Color photographic recording material
US4026709A · kind A · utility
11Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1976 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Apr 19, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3212
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to new compounds having an active methylene group or phenolic hydroxyl group and therefore capable of being used as photographic color couplers. The new compounds contain at least one radical of a phosphoric acid diester, phosphonic acid diester, phosphoric acid diamide, phosphonic acid diamide, phosphoric acid ester-amide or phosphonic acid ester-amide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.