F03G 4/029
Closed loop geothermal collectors, i.e. the fluid is pumped through a closed
Official title: {closed loop geothermal collectors, i.e. the fluid is pumped through a closed loop in heat exchange with the geothermal source, e.g. via a heat exchanger}
F03G4/029 (Closed loop geothermal collectors, i.e. the fluid is pumped through a closed) appears on 156 US grants and 173 published applications in this corpus.
Search patents in F03G- Granted patents
- 156
- Published applications
- 173
- Assignees
- 84
- Inventors
- 234
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 2 |
| 2009 | 2 | 4 |
| 2010 | 0 | 5 |
| 2011 | 1 | 4 |
| 2012 | 2 | 4 |
| 2013 | 4 | 10 |
| 2014 | 3 | 4 |
| 2015 | 7 | 6 |
| 2016 | 5 | 3 |
| 2017 | 4 | 6 |
| 2018 | 5 | 8 |
| 2019 | 4 | 6 |
| 2020 | 6 | 10 |
| 2021 | 8 | 12 |
| 2022 | 9 | 14 |
| 2023 | 19 | 13 |
| 2024 | 20 | 31 |
| 2025 | 24 | 18 |
| 2026 | 11 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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 for generating energy from geothermal sources and methods of operating and constructing same30 Jun 2026US 12,669,269 B2Roda Energy Corporation
- Slurry and use thereof for enhancing geothermal energy production from heat reservoir and method for producing same16 Jun 2026US 12,655,831 B2Element Technical Services Inc.
- Combined power generation using geothermal and solar energy12 May 2026US 12,624,682 B2Nant Holdings IP, LLC
- Systems for Generating Energy from Geothermal Sources and Methods of Operating and Constructing Same24 Sep 2026US 2026/0287213 A1Roda Energy Corporation
- Combined Power Generation using Geothermal and Solar Energy3 Sep 2026US 2026/0258792 A1Nant Holdings IP, LLC
- Method and apparatus to install a geothermal heat exchanger into a magma pool30 Jul 2026US 2026/0218686 A1
- Method For Achieving A Target Width Of A Thermal Pathway Formed In A Subterranean Heat Reservoir16 Jul 2026US 2026/0201870 A1Element Technical Services Inc.
- Wells having non-circular cross-sections and methods of use thereof9 Jul 2026US 2026/0193938 A1The Board of Regents of the University of Oklahoma
Most cited
By later US patents
- Method and apparatus for steam generation from isothermal geothermal reservoirs106US 6,073,448 A2000
- System for geothermal production of electricity104US 5,661,977 A1997
- Geothermal heat recovery from high-temperature, low-permeability geologic formations for power generation using closed loop systems83US 10,527,026 B2GreenFire Energy Inc. · 2020
- System and method of capturing geothermal heat from within a drilled well to generate electricity83US 8,616,000 B22013
- Geothermal heat mining and utilization75US 5,515,679 A1996