Photographic developing agents containing stable, soluble, pyrazolidinones
US4753869A · kind A · utility
9Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1986 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Nov 24, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/3028
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Salts of 1-phenyl-3-pyrazolidinones with organic sulphonic acids, which are useful photographic silver halide developing agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.