3-pyrazolidinone salts
US4732981A · kind A · utility
0Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1987 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Apr 1, 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.