F03G 4/00
Devices for producing mechanical power from geothermal energy
F03G4/00 (Devices for producing mechanical power from geothermal energy) appears on 676 US grants and 561 published applications in this corpus.
Search patents in F03G- Granted patents
- 676
- Published applications
- 561
- Assignees
- 284
- Inventors
- 910
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 18 | 0 |
| 1978 | 12 | 0 |
| 1979 | 15 | 0 |
| 1980 | 12 | 0 |
| 1981 | 11 | 0 |
| 1982 | 18 | 0 |
| 1983 | 14 | 0 |
| 1984 | 12 | 0 |
| 1985 | 9 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 8 | 0 |
| 1989 | 4 | 0 |
| 1990 | 8 | 0 |
| 1991 | 7 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 13 | 0 |
| 1998 | 6 | 0 |
| 1999 | 9 | 0 |
| 2000 | 7 | 0 |
| 2001 | 12 | 4 |
| 2002 | 1 | 1 |
| 2003 | 4 | 4 |
| 2004 | 4 | 3 |
| 2005 | 4 | 4 |
| 2006 | 4 | 9 |
| 2007 | 4 | 7 |
| 2008 | 3 | 5 |
| 2009 | 4 | 9 |
| 2010 | 4 | 24 |
| 2011 | 4 | 26 |
| 2012 | 8 | 20 |
| 2013 | 10 | 30 |
| 2014 | 18 | 40 |
| 2015 | 19 | 28 |
| 2016 | 28 | 15 |
| 2017 | 26 | 13 |
| 2018 | 16 | 13 |
| 2019 | 4 | 13 |
| 2020 | 9 | 25 |
| 2021 | 23 | 25 |
| 2022 | 29 | 39 |
| 2023 | 45 | 44 |
| 2024 | 51 | 73 |
| 2025 | 54 | 51 |
| 2026 | 40 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F03G 4/033Devices for producing mechanical power from geothermal energy: having a rankine cycle426
- F03G 4/023Devices for producing mechanical power from geothermal energy: characterised by the geothermal402
- F03G 4/074Safety arrangements351
- F03G 4/001Binary cycle plants where the source fluid from the geothermal collector heats202
- F03G 4/072Controlling or monitoring125
- F03G 4/06Devices for producing mechanical power from geothermal energy: with fluid flashing114
- F03G 4/069Devices for producing mechanical power from geothermal energy: characterised by the brine113
- F03G 4/037Devices for producing mechanical power from geothermal energy: having other power cycles83
All 13 subgroupsShow fewer
- F03G 4/02Devices for producing mechanical power from geothermal energy: with direct working fluid81
- F03G 4/063Devices for producing mechanical power from geothermal energy: with energy storage devices75
- F03G 4/045Devices for producing mechanical power from geothermal energy: with heat pumps23
- F03G 4/031Devices for producing mechanical power from geothermal energy: using waste heat from21
- F03G 4/04Devices for producing mechanical power from geothermal energy: with deep-well turbo pump4
Recent patents
- Assembly for generating electricity in a production well of a hot fluid6 Oct 2026US 12,753,677 B2Affin AS
- Method for removing scale from geothermal turbine blade and method for geothermal power generation22 Sep 2026US 12,742,442 B2Japan Metals & Chemicals Co., Ltd.
- Integrated carbon sequestration and power generation system and methods of use1 Sep 2026US 12,723,540 B2Arbor Energy and Resources Corporation
- Hybrid flexible energy solution using geothermal and hydrogen for data center applications1 Sep 2026US 12,723,572 B1Microsoft Technology Licensing, LLC
- Apparatus and methods for producing electricity using geothermal energy11 Aug 2026US 12,704,114 B2Geogen Technologies Inc.
- Systems and methods for drilling geothermal wells1 Oct 2026US 2026/0298032 A1Helmerich & Payne Technologies, LLC
- Geothermal and geopressure recovery systems1 Oct 2026US 2026/0298213 A1Sage Geosystems Inc.
- Pressure and temperature recovery systems for geothermal power plants24 Sep 2026US 2026/0286940 A1Sage Geosystems Inc.
- Pondless hydromechanical storage system24 Sep 2026US 2026/0286941 A1Sage Geosystems Inc.
- Systems for Generating Energy from Geothermal Sources and Methods of Operating and Constructing Same24 Sep 2026US 2026/0287213 A1Roda Energy Corporation
Most cited
By later US patents
- Method and apparatus for converting heat from geothermal liquid and geothermal steam to electric power142US 5,440,882 AExergy S.P.A. · 1995
- Method and apparatus for converting heat from geothermal fluid to electric power114US 4,982,568 A1991
- Method and apparatus for cooling hot fluids112US 5,860,279 A1999
- Process for heating a fluid in a geothermal formation110US 4,060,988 ATexaco Inc. · 1977
- Method of and apparatus for producing power using steam107US 5,497,624 AOrmat, Inc. · 1996