Inventor · disambiguated record
Sigmund Fugleberg
Also filed as: FUGLEBERG SIGMUND · FUGLEBERG SIGMUND P · FUGLEBERG SIGMUND PEDER · HEIMALA SEPPO O
22 granted patents·1 pending application·298 citations·filing 1974–2006
96Inventor score
Top patents by PatentIndex Score
23 records- 0186US7118719B2Method for the hydrolytic precipitation of ironOUTOKUMPU OY·Filed 2001·Granted Oct 10, 2006·19 cites·10 claims
- 0282US4219354AHydrometallurgical process for the treatment of oxides and ferrites which contain iron and other metalsOUTOKUMPU OY·Filed 1978·Granted Aug 26, 1980·21 cites·8 claims
- 0380US3959437AHydrometallurgical process for the recovery of zinc, copper and cadmium from their ferritesOUTOKUMPU OY·Filed 1974·Granted May 25, 1976·24 cites·11 claims
- 0477US5628817AMethod for leaching nickel-copper matte employing substantially neutral leaching solutionsOUTOKUMPU ENG CONTRACT·Filed 1995·Granted May 13, 1997·41 cites·17 claims
- 0573US5120353AHydrometallurgic method for processing raw materials containing zinc sulphideOUTOKUMPU OY·Filed 1991·Granted Jun 9, 1992·19 cites·9 claims
- 0670US3954452AProcess for separating Cd from Zn by cementationOUTOKUMPU OY·Filed 1974·Granted May 4, 1976·12 cites·5 claims
- 0769US7811357B2Method for recovering rare metals in zinc leaching processOUTOTEC OYJ·Filed 2006·Granted Oct 12, 2010·2 cites·24 claims
- 0869US4220627AProcess for the treatment of raw materials containing arsenic and metalOUTOKUMPU OY·Filed 1978·Granted Sep 2, 1980·12 cites·10 claims
- 0967US6039790AMethod for recovering nickel hydrometallurgically from two different nickel mattesOUTOKUMPU OY·Filed 1996·Granted Mar 21, 2000·17 cites·18 claims
- 1065US6340450B1Method for leaching zinc concentrate in atmospheric conditionsOUTOKUMPU OY·Filed 1997·Granted Jan 22, 2002·21 cites·3 claims
- 1164US6702871B1Method for the reduction of nickelOUTOKUMPU OY·Filed 2000·Granted Mar 9, 2004·6 cites·13 claims
- 1264US5178842AMethod for precipitating and separating metalsOUTOKUMPU OY·Filed 1988·Granted Jan 12, 1993·11 cites·5 claims
- 1363US3979266AProcess for purifying aqueous solutions, of metal ions precipitating as arsenides, antimonides, tellurides, and selenidesOUTOKUMPU OY·Filed 1975·Granted Sep 7, 1976·10 cites·11 claims
- 1462US4452762AHydrometallurgical process for the recovery of valuable metals from metallic alloysOUTOKUMPU OY·Filed 1981·Granted Jun 5, 1984·13 cites·3 claims
- 1561US5585079AMethod for leaching material containing zinc oxide and zinc silicateOUTOKUMPU ENG CONTRACT·Filed 1995·Granted Dec 17, 1996·17 cites·3 claims
- 1660US6712874B1Method for the reduction of nickel from an aqueous solutionOUTOKUMPU OY·Filed 2000·Granted Mar 30, 2004·7 cites·29 claims
- 1758US5199974AMethod for recovering metal contents of metallurgic waste precipitates or waste dusts by suspension smeltingOUTOKUMPU RESEARCH OY·Filed 1992·Granted Apr 6, 1993·9 cites·20 claims
- 1852US4698139AHydrometallurgical method for treating valuable metal raw materials containing chlorides and fluoridesOUTOKUMPU OY·Filed 1986·Granted Oct 6, 1987·16 cites·1 claims
- 1952US4526650AMethod for regenerating pickling acidsOUTOKUMPU OY·Filed 1984·Granted Jul 2, 1985·9 cites·9 claims
- 2046US6206951B1Method for leaching nickel from nickel matteOYJ OUTOKUMPU·Filed 1999·Granted Mar 27, 2001·8 cites·25 claims
- 2139US4148862AHydrometallurgical treatment of soluble silicate-bearing zinc materialsOUTOKUMPU OY·Filed 1977·Granted Apr 10, 1979·4 cites·5 claims
- 2239US2004159187A1Method for the reduction of nickel from an aqueous solutionFiled 2004·Application pending·0 cites
- 2330US7615100B2Method for the precipation of silica in connection with zinc ore leachingOUTOTEC OYJ·Filed 2002·Granted Nov 10, 2009·0 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →