Inventor · disambiguated record
Derek G. E. Kerfoot
Also filed as: KERFOOT DEREK G E · KERFOOT DEREK GEORGE EAGLAND
13 granted patents·293 citations·filing 1974–2002
93Inventor score
Files withNORANDA MINES LTD4SHERRITT GORDON MINES LTD3INCO LTD2SHERRITT GORDON LTD2CANADA WIRE & CABLE CO LTD1
Top patents by PatentIndex Score
13 records- 0195US4338168AHydrometallurgical treatment of copper-bearing hematite residueNORANDA MINES LTD·Filed 1981·Granted Jul 6, 1982·71 cites·4 claims
- 0291US6428604B1Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrateINCO LTD·Filed 2000·Granted Aug 6, 2002·32 cites·12 claims
- 0388US4571262ARecovery of platinum group metals from nickel-copper-iron matteSHERRITT GORDON MINES LTD·Filed 1985·Granted Feb 18, 1986·50 cites·9 claims
- 0485US6569224B2Hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrateINCO LTD·Filed 2002·Granted May 27, 2003·18 cites·1 claims
- 0581US5344479AUpgrading copper sulphide residues containing nickel and arsenicSHERRITT GORDON LTD·Filed 1993·Granted Sep 6, 1994·45 cites·10 claims
- 0669US3988418AHydrometallurgical production of technical grade molybdic oxide from molybdenite concentratesNORANDA MINES LTD·Filed 1975·Granted Oct 26, 1976·16 cites·21 claims
- 0758US4115512AMethod for removing arsenic from copper and/or nickel bearing aqueous acidic solutions by solvent extractionNORANDA MINES LTD·Filed 1976·Granted Sep 19, 1978·8 cites·12 claims
- 0855US5993514AProcess for upgrading copper sulphide residues containing nickel and ironDYNATEC CORP·Filed 1997·Granted Nov 30, 1999·12 cites·13 claims
- 0955US4330508ARemoval of selenium (IV) and (VI) from acidic copper sulphate solutionsSHERRITT GORDON MINES LTD·Filed 1980·Granted May 18, 1982·10 cites·6 claims
- 1054US4132667ACorrosion inhibiting molybdate pigment and preparation thereofNORANDA MINES LTD·Filed 1977·Granted Jan 2, 1979·6 cites·23 claims
- 1153US5468281AProcess for the separation of cobalt from nickelSHERRITT GORDON LTD·Filed 1993·Granted Nov 21, 1995·11 cites·16 claims
- 1250US4006269APhotodeposition of metals on a non-conductive substrateCANADA WIRE & CABLE CO LTD·Filed 1974·Granted Feb 1, 1977·7 cites·92 claims
- 1348US4374808ARemoval of selenium from acidic copper/nickel solutionsSHERRITT GORDON MINES LTD·Filed 1982·Granted Feb 22, 1983·7 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →