Process for sodium sulfide/ferrous sulfate treatment of hexavalent chromium and other heavy metals
US5000859A · kind A · utility
19Cited by
13References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1988 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Oct 26, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/913
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.