Duisburger Kupferhutte
6Patents
0Active
6Granted
26Portfolio score
Filing activity: Mar 18, 1974 → Nov 2, 1977
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4008076A | Method for processing manganese nodules and recovering the values contained therein | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4131454A | Process for recovering silver and gold from chloride solutions | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4030990A | Process for recovering electrolytic copper of high purity by means of reduction electrolysis | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4127639A | Process for recovering silver from residues containing silver and lead | Emerging Cross-Sectional Technologies | 10 | Expired |
| US3969107A | Combined process for working up pure and complex copper concentrates | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4104055A | Process for working up copper cementate sludges | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.