Derek G. E. Kerfoot
13Patents
7h-index
12Co-inventors
63Inventor score
Filing activity: Nov 29, 1974 → Jun 19, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4338168A | Hydrometallurgical treatment of copper-bearing hematite residue | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5344479A | Upgrading copper sulphide residues containing nickel and arsenic | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4571262A | Recovery of platinum group metals from nickel-copper-iron matte | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6428604B1 | Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6569224B2 | Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate | Emerging Cross-Sectional Technologies | 14 | Expired |
| US3988418A | Hydrometallurgical production of technical grade molybdic oxide from molybdenite concentrates | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4330508A | Removal of selenium (IV) and (VI) from acidic copper sulphate solutions | Chemistry; Metallurgy | 7 | Expired |
| US4115512A | Method for removing arsenic from copper and/or nickel bearing aqueous acidic solutions by solvent extraction | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4374808A | Removal of selenium from acidic copper/nickel solutions | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4132667A | Corrosion inhibiting molybdate pigment and preparation thereof | Chemistry; Metallurgy | 5 | Expired |
| US4006269A | Photodeposition of metals on a non-conductive substrate | Electricity | 4 | Expired |
| US5468281A | Process for the separation of cobalt from nickel | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5993514A | Process for upgrading copper sulphide residues containing nickel and iron | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.