| Patents for F03G 4 - Devices for producing mechanical power from geothermal energy (645) |
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| 06/14/2001 | WO2001042721A2 An energy transfer system and a method for providing energy transfer services |
| 06/06/2001 | CN1066815C Energy conversion mechanism |
| 05/09/2001 | CN1065593C Method and appts. for converting heat from geothermal liquid and geothermal steam to electric power |
| 05/01/2001 | US6223535 Geothermal steam processing |
| 02/22/2001 | WO2001012983A1 Transport network comprising a fleet of vehicles, boat and station for recharging such a transport system with compressed air |
| 01/25/2001 | DE19932001A1 Geothermal heat utilization apparatus has throttle for making working medium vaporizable |
| 11/02/2000 | EP1048820A2 Method for exploiting geothermal energy and heat exchanger apparatus therefor |
| 09/26/2000 | US6122915 Multistage two-phase turbine |
| 06/15/2000 | DE19919555C1 Extraction of geothermal energy from blind bores involves closed circuit feed of heat transmission medium with first chamber in heat exchanger tube for feed of cold fluid |
| 05/04/2000 | WO2000025022A1 Method and device for treating geothermal fluids |
| 04/25/2000 | CA2197038C Converting heat into useful energy |
| 04/20/2000 | DE19846042C1 Extractor for geothermal energy uses underground steam turbines driven by water heated at a deeper level |
| 02/23/2000 | EP0839278A4 Multistage two-phase turbine |
| 01/04/2000 | US6009711 Apparatus and method for producing power using geothermal fluid |
| 10/26/1999 | US5970714 Geothermal power plant operating on high pressure geothermal fluid |
| 10/12/1999 | US5965031 Generating electricity and inhibiting formation of silica-containing scale and/or removing previously formed silica-containing scale during the production by mixing in sulfurous acid, sulfurous acid precursors |
| 09/07/1999 | US5946915 Multistage two-phase turbine |
| 08/31/1999 | USRE36282 Drilling a bore hole; withdrawal fluids; separation |
| 04/20/1999 | CA2117862C Rotor blade damping structure for axial-flow turbine |
| 01/12/1999 | US5857338 Seal system for geothermal power plant operating on high pressure geothermal steam |
| 11/24/1998 | US5839282 Method and means for using a two phase fluid |
| 10/20/1998 | US5822990 Converting heat into useful energy using separate closed loops |
| 07/08/1998 | CN1186910A Gas solution adsorption geothermal power generation |
| 05/06/1998 | EP0839278A1 Multistage two-phase turbine |
| 02/24/1998 | US5720799 Multistage two-phase turbine |
| 12/16/1997 | US5697218 System for geothermal production of electricity |
| 12/09/1997 | US5694772 Method of apparatus for disposing of non-condensable gases present in geo fluid |
| 11/26/1997 | CN1165909A Converting heat into useful energy |
| 09/30/1997 | US5671601 Geothermal power plant operating on high pressure geothermal fluid |
| 09/09/1997 | US5664420 Multistage two-phase turbine |
| 09/09/1997 | US5664419 Method of and apparatus for producing power using geothermal fluid |
| 09/02/1997 | US5661977 System for capturing geothermal heat using electrolytic reactions |
| 08/26/1997 | US5660042 Geothermal power plant |
| 08/20/1997 | EP0790391A2 Converting heat into useful energy |
| 08/12/1997 | US5656172 Using sulforous or sulfuric acid |
| 04/08/1997 | US5617738 Energy converter |
| 02/04/1997 | US5598706 Method of and means for producing power from geothermal fluid |
| 12/19/1996 | WO1996041078A1 Multistage two-phase turbine |
| 12/10/1996 | US5582690 Method of and means for water desalinization |
| 12/10/1996 | US5582011 Method of and apparatus for generating power from geothermal fluid containing a relatively high concentration of non-condensable gases |
| 11/21/1996 | DE19517897A1 Method of converting thermal energy into mechanical one |
| 08/14/1996 | CN1128842A Energy conversion mechanism |
| 07/24/1996 | CN1032383C Method of and means for extracting heat from hot fluid containing foreign material that interferes with heat transfer |
| 07/17/1996 | CN1032324C Method and apparatus for converting low temperature heat to electric power |
| 06/12/1996 | EP0444170B1 Process for making general use of the earth's heat and obtaining minerals in the zone of weakness (at depths of 13-30 km) |
| 05/14/1996 | US5515679 Method for recovering thermal energy contained in subterranean hot rock |
| 04/30/1996 | US5511948 Rotor blade damping structure for axial-flow turbine |
| 03/27/1996 | EP0703420A2 Energy converter |
| 03/12/1996 | US5497624 Method of and apparatus for producing power using steam |
| 10/25/1995 | CN1110762A Method and apparatus for converting heat from geothermal liquid and geothermal steam to electric power |
| 08/22/1995 | US5442906 Combined geothermal and fossil fuel power plant |
| 08/15/1995 | US5440882 Method and apparatus for converting heat from geothermal liquid and geothermal steam to electric power |
| 05/10/1995 | EP0652368A1 Method and apparatus for converting heat from geothermal liquid and geothermal steam to electric power |
| 04/11/1995 | US5404937 Method of and apparatus for producing power from solar ponds |
| 03/28/1995 | US5400598 Method and apparatus for producing power from two-phase geothermal fluid |
| 01/11/1995 | CN1097240A Geothermal power plant operating on high pressure geothermal fluid |
| 01/11/1995 | CN1097239A Geothermal power plant operating on high pressure geothermal fluid |
| 06/15/1994 | CN1025063C Silencer for geothermal power plant discharging waste geothermal fluid and method for using same |
| 06/09/1994 | WO1994012776A1 Combined geothermal and fossil fuel power plant |
| 11/23/1993 | US5263322 Method of recovering energy from liquids in deep cavities |
| 10/19/1993 | US5253926 Process for making general use of the earth's heat and obtaining minerals in the zone of weakness (at depths of 13-30 km) |
| 06/22/1993 | US5220792 Method of and means for extracting heat from a hot fluid containing foreign material that interferes with heat transfer |
| 04/20/1993 | US5203173 Device for utilization of geothermal energy |
| 04/14/1993 | CN1070982A Method of and means for extracting heat from hot fluid containing foreign material that interferes with heat transfer |
| 04/01/1993 | DE4131990A1 Power generating installation deriving electrical energy from earth heat - involves steam boiler with steam turbine and generator in deep earth location |
| 11/24/1992 | US5165235 System for using geopressured-geothermal reservoirs |
| 09/22/1992 | US5148677 Method of and means for extracting heat from a hot fluid containing foreign material that interferes with heat transfer |
| 09/08/1992 | US5145515 Passing acidified constituents through conduit packed with metal higher in electromotive series than copper |
| 05/14/1992 | DE4035870A1 Work process and equipment - uses thermal energy from heat sources evaporating easily boiled medium in heat exchanger |
| 03/17/1992 | US5095705 Process for producing energy from water flowing down a borehole and recovery same |
| 02/26/1992 | EP0472020A1 Method and apparatus for converting low temperature heat to electric power |
| 02/26/1992 | CN1059014A Method and apparatus for converting low temperature heat to electric power |
| 01/23/1992 | DE4022627A1 Liquid gas vapour engines and turbines - use natural heat sources for vaporisation of helium which is then cooled |
| 01/21/1992 | US5082492 Brines |
| 01/08/1992 | EP0464020A1 Power station for converting elementary energy into thermal energy |
| 12/05/1991 | DE4017684A1 Utilising thermal and mechanical energy potentials - esp. of environment, for remote electrical and thermal energy prodn. |
| 12/02/1991 | WO1991019139A1 Process for using energy potentials, in particular with small temperature differences |
| 12/02/1991 | CA2084202A1 Process for using energy potentials, in particular with small temperature differences |
| 11/21/1991 | EP0457416A1 Device for using geothermal energy |
| 11/19/1991 | WO1991018205A1 Device for utilizing geothermal energy |
| 11/19/1991 | CA2063833A1 Device for utilizing geothermal energy |
| 10/23/1991 | CN1055582A Silencer for geothermal power plant and method for using same |
| 09/04/1991 | EP0444170A1 Process for making general use of the earth's heat and obtaining minerals in the zone of weakness (at depths of 13-30 km). |
| 08/13/1991 | US5038567 Method of and means for using a two-phase fluid for generating power in a rankine cycle power plant |
| 07/09/1991 | US5029444 Method and apparatus for converting low temperature heat to electric power |
| 07/04/1991 | DE3943161A1 Liq. vapour engine and turbine - generates power using only liq. gas heated by solar radiation or geothermal water and then re-liquefied |
| 06/11/1991 | US5022787 Method of returning geothermal gases to the underground |
| 06/04/1991 | US5020328 Silencer for geothermal power plant and method for using the same |
| 04/02/1991 | US5003779 Geothermal energy conversion system |
| 03/12/1991 | WO1991003690A1 Process for making general use of the earth's heat and obtaining minerals in the zone of weakness (at depths of 13-30 km) |
| 03/12/1991 | CA2041637A1 Recovery of geothermal energy and mineral resources |
| 03/12/1991 | CA1281279C Geothermal energy recovery apparatus |
| 01/08/1991 | US4982568 Thermodynamic cycle |
| 11/06/1990 | US4967559 Contaminant abatement process for geothermal power plant effluents |
| 10/04/1990 | WO1990011446A1 Power station for converting elementary energy into thermal energy |
| 09/04/1990 | US4953356 Geothermal reboiler apparatus and method |
| 09/04/1990 | CA1273496A1 Geothermal energy utilization system |
| 06/13/1990 | EP0372864A1 Method of and apparatus for producing power using steam |
| 06/05/1990 | US4930316 Geothermal plant noncondensable gas removal and heat recovery system and method |
| 01/23/1990 | US4894993 Method of and apparatus for producing power from solar ponds |