Developing agents
US4917992A · kind A · utility
8Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1987 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Oct 23, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/26
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Salts of 1-phenyl-3-pyrazolidinones which are useful photographic silver halide developing agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.