| Patents for C22B 41 - Obtaining germanium (284) |
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| 05/11/2005 | CN1614049A Method and apparatus for drying hydrated germanium dioxide by microwave in extraction |
| 04/21/2005 | WO2005005673A3 Method for preparing high-purity germanium hydride |
| 01/20/2005 | WO2005005673A2 Method for preparing high-purity germanium hydride |
| 12/22/2004 | EP1179367B1 Use of a chelate-forming porous hollow fiber membrane and method for the recovery of germanium oxide with the same |
| 11/03/2004 | EP1408127B1 Method for recovering germanium and other metals from fly ash generated in an integrated gasification combined cycle-type (igcc) thermal station |
| 10/05/2004 | US6800111 Concentrating the catalytic metal colloid on a filter; removing the catalytic metal of the catalytic metal colloid from the filter with an oxidizer; collecting the catalytic metal |
| 09/08/2004 | CN1526840A Germanium recovering method |
| 09/07/2004 | US6787117 Porous hollow fiber membrane having chelate formability and method for recovery of germanium oxide using the porous hollow fiber membrane |
| 04/14/2004 | EP1408127A1 Method for recovering metals from the flying ashes generated in an integrated gasification combined cycle-type (igcc) thermal station |
| 01/07/2004 | CN1465728A Method for recovering germanium from germanium-extracting coal slag |
| 12/10/2003 | CN1130267C Chelate-forming porous hollow fiber membrane and method for recovery of germanium oxide with same |
| 12/12/2002 | WO2002099145A1 Method for recovering metals from the flying ashes generated in an integrated gasification combined cycle-type (igcc) thermal station |
| 11/14/2002 | US20020168309 Method for recovering catalytic metals |
| 10/30/2002 | CN1376803A Recovery method for catalytic metal |
| 07/24/2002 | EP1224972A1 A method for recovering catalytic metals from a colloidal solution |
| 05/29/2002 | CN1351521A Chelate-forming porous hollow fiber membrane and method for the recovery of germanium oxide with the same |
| 03/14/2002 | WO2002020858A1 Method for recuperating metal elements from zinc-bearing raw materials using molten lead |
| 02/13/2002 | EP1179367A1 Chelate-forming porous hollow fiber membrane and method for the recovery of germanium oxide with the same |
| 01/08/2002 | US6337057 Process for the direct production of germanium tetrachloride from hydrated germanate-containing solids using gaseous hydrogen chloride |
| 07/31/2001 | US6268041 Narrow size distribution silicon and germanium nanocrystals |
| 12/27/2000 | EP1063200A1 Process for the direct production of germanium tetrachloride from hydrated germanate-containing solids using gaseous hydrogen chloride |
| 11/16/2000 | WO2000067905A1 Chelate-forming porous hollow fiber membrane and method for the recovery of germanium oxide with the same |
| 04/25/2000 | US6054104 Method and apparatus for germanium reclamation from chemical vapor deposition |
| 12/15/1998 | US5850064 Method for photolytic liquid phase synthesis of silicon and germanium nanocrystalline materials |
| 10/22/1998 | WO1998046799A1 Method for photolytic liquid phase synthesis of group iv nanocrystalline materials |
| 09/09/1998 | EP0863218A1 A method and apparatus for germanium reclamation from chemical vapor deposition exhaust gas streams |
| 08/13/1997 | CN1035630C Extraction of germanium from lignite |
| 09/13/1995 | CN1108310A Method for recovering germanium from boiler tail gas |
| 06/06/1995 | CA1335756C Process for the recovery of germanium from solutions that contain it |
| 04/12/1995 | CN1101380A Extraction of germanium from lignite |
| 06/29/1994 | CN1025223C Germanium extracting technology from coal containing same |
| 03/22/1994 | US5296203 Recovery of niobium from irradiated targets |
| 12/07/1993 | CA1324977C Process of treating residues from the hydrometallurgical production of zinc |
| 05/19/1993 | CN1020711C Process for recovery of germanium from solutions containing germanium |
| 05/04/1993 | CA1317273C Recovery of germanium from aqueous solutions by solvent extraction |
| 03/31/1993 | CN1070430A Process for extracting germanium from germanic coal |
| 03/02/1993 | US5190735 Radioactive isotopes |
| 01/05/1993 | CA1312207C Recovery of germanium from aqueous solutions by solvent extraction |
| 07/09/1991 | US5030426 Biomining of gallium and germanium containing ores |
| 07/09/1991 | US5030425 Biodegradation and recovery of gallium and other metals from integrated circuits |
| 03/21/1991 | WO1991003424A1 Biomining of gallium and germanium containing ores |
| 01/10/1991 | WO1991000369A1 Biodegradation and recovery of gallium and other metal from integrated circuits |
| 04/10/1990 | US4915919 Recovery of germanium from aqueous solutions by solvent extraction |
| 12/12/1989 | US4886648 Complexing with acid, extracting with organic solution, scrubbing, dissociating and precipitating |
| 04/26/1989 | EP0313201A1 Recovery of germanium from aqueous solutions by solvent extraction |
| 01/25/1989 | CN1030562A Process for recovery of germanium from solutions containing germanium |
| 01/18/1989 | EP0299901A2 Process for the recovery of germanium from solutions that contain it |
| 12/06/1988 | US4789446 Method of processing residues from the hydrometallurgical production of zinc |
| 06/21/1988 | CA1238192A1 Method for the recovery of germanium |
| 05/11/1988 | CN85105036B Process for preparing n-zn complex fertilizers |
| 04/13/1988 | EP0263539A1 Process for treating zinc hydrometallurgy residues |
| 03/30/1988 | CN86108223A Method for recovery of germanium |
| 12/16/1987 | EP0249520A1 Process for recovering indium, germanium and/or gallium using ion exchangers containing phosphonic groups |
| 07/07/1987 | US4678647 Process for the recovery of gallium and germanium from coal fly ash |
| 03/11/1987 | CN85105036A Process for preparing n-zn complex fertilizers |
| 02/17/1987 | US4643110 Direct fuel-fired furnace arrangement for the recovery of gallium and germanium from coal fly ash |
| 01/08/1986 | EP0167414A1 Process for the selective extraction of germanium |
| 12/04/1985 | EP0162954A2 Process for obtaining a germanium concentrate |
| 05/28/1985 | CA1187707A1 Process for separating germanium from an aqueous solution by means of an alphahydroxyoxime |
| 05/28/1985 | CA1187706A1 Process for separating germanium from an aqueous solution |
| 12/11/1984 | US4487162 Magnetoplasmadynamic apparatus for the separation and deposition of materials |
| 12/11/1984 | CA1179145A1 Process for selective liquid-liquid extraction of germanium |
| 09/11/1984 | US4471003 Magnetoplasmadynamic apparatus and process for the separation and deposition of materials |
| 08/28/1984 | CA1173218A1 Removal of germanium from the effluent of processes for the production of optical components |
| 02/21/1984 | US4432952 And a base for solvent extraction |
| 02/21/1984 | US4432951 Solvent extraction with substituted 8-hydroxy-quinoline, then contacting with base |
| 12/06/1983 | US4419151 Crystal and germanium modification and process for its preparation |
| 06/21/1983 | US4389379 Process for selective liquid-liquid extraction of germanium |
| 05/31/1983 | US4385915 Removal of germanium from the effluent of processes for the production of optical components |
| 01/05/1983 | EP0068541A1 Process for the recovery of germanium from an aqueous solution |
| 01/05/1983 | EP0068540A1 Process for the recovery of germanium from an aqueous solution using an alpha-hydroxyoxime |
| 03/04/1982 | WO1982000664A1 Process for selective extraction of germanium |
| 02/24/1982 | EP0046437A1 Process for the selective extraction of germanium |
| 02/11/1981 | EP0023509A1 Cold crucible semiconductor deposition process and apparatus |
| 11/04/1980 | US4231755 Process for purifying solid substances |
| 08/12/1980 | CA1083358A1 Process for the recovery and purification of germanium from zinc ores |
| 07/24/1980 | WO1980001489A1 Cold crucible semiconductor deposition process and apparatus |
| 10/23/1979 | CA1064699A1 Supply of charge material to shaft furnaces |
| 08/21/1979 | US4165249 Method of purifying germanium bodies |
| 01/02/1979 | US4132763 Process for the production of pure, silicon elemental semiconductor material |
| 09/12/1978 | CA1038268A1 Growing single crystals in a crucible |
| 05/23/1978 | US4090871 Process for the recovery and purification of germanium from zinc ores |
| 08/09/1977 | US4040530 Shaft furnace feed device |
| 08/24/1976 | US3976743 Treatment of zinc plant residue |