Photographic material containing 2-acyl-2-pyrazolin-5-on-couplers
US4061498A · kind A · utility
4Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1976 |
| Grant date | Dec 6, 1977 |
| Priority date | — |
| Expiry date | May 27, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F13/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
2-Acyl-3-pyrazolin-5-one couplers are provided for use in color photography which upon color development form 2-pyrazolin-5-one couplers capable of coupling with the oxidation products of the color developing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.