Ralph Peter Hackl
18Patents
10h-index
17Co-inventors
69Inventor score
Filing activity: Mar 3, 1983 → Feb 17, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4571387A | Biological-acid leach process | Emerging Cross-Sectional Technologies | 69 | Expired |
| US6660059B2 | Method for thiosulfate leaching of precious metal-containing materials | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4987081A | Chemical/biological process to oxidize multimetallic sulphide ores | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4888293A | Adapting bacteria to low pH and high arsenic concentration for use in oxidizing sulfide ores | Emerging Cross-Sectional Technologies | 28 | Expired |
| US7066983B2 | Method for thiosulfate leaching of precious metal-containing materials | Emerging Cross-Sectional Technologies | 25 | Expired |
| US7722840B2 | Method for thiosulfate leaching of precious metal-containing materials | Emerging Cross-Sectional Technologies | 17 | Expired |
| US7544232B2 | Method for thiosulfate leaching of precious metal-containing materials | Emerging Cross-Sectional Technologies | 16 | Active |
| US7559974B2 | Method for thiosulfate leaching of precious metal-containing materials | Emerging Cross-Sectional Technologies | 16 | Active |
| US7704298B2 | Method for thiosulfate leaching of precious metal-containing materials | Emerging Cross-Sectional Technologies | 14 | Expired |
| US8097227B2 | Method for thiosulfate leaching of precious metal-containing materials | Emerging Cross-Sectional Technologies | 10 | Active |
| US8821613B2 | Method for thiosulfate leaching of precious metal-containing materials | Emerging Cross-Sectional Technologies | 9 | Active |
| US8597399B2 | Method for thiosulfate leaching of precious metal-containing materials | Emerging Cross-Sectional Technologies | 8 | Active |
| US5089412A | Bacteria for oxidizing multimetallic sulphide ores | Emerging Cross-Sectional Technologies | 7 | Expired |
| US10563287B2 | Leaching copper-containing ores | Emerging Cross-Sectional Technologies | 2 | Active |
| US10563284B2 | Leaching copper-containing ores | Emerging Cross-Sectional Technologies | 2 | Active |
| US11236407B1 | Metal recovery by leaching agglomerates of metal-containing material/pyrite | Emerging Cross-Sectional Technologies | 2 | Active |
| US10526685B2 | Heap leaching | Emerging Cross-Sectional Technologies | 2 | Active |
| USRE50227E1 | Leaching copper-containing ores | General | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.