F24F 5/005
Using energy from the ground by air circulation
Official title: {using energy from the ground by air circulation, e.g. "Canadian well"}
F24F5/005 (Using energy from the ground by air circulation) appears on 57 US grants and 56 published applications in this corpus.
Search patents in F24F- Granted patents
- 57
- Published applications
- 56
- Assignees
- 24
- Inventors
- 84
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 4 |
| 2005 | 1 | 0 |
| 2006 | 2 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 4 |
| 2010 | 1 | 4 |
| 2011 | 1 | 2 |
| 2012 | 1 | 2 |
| 2013 | 4 | 1 |
| 2014 | 2 | 5 |
| 2015 | 0 | 0 |
| 2016 | 1 | 4 |
| 2017 | 0 | 2 |
| 2018 | 2 | 4 |
| 2019 | 1 | 3 |
| 2020 | 3 | 5 |
| 2021 | 2 | 2 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 7 |
| 2025 | 4 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Temperature control system with a subsurface intake assembly, and a subsurface intake assembly for a temperature control system10 Feb 2026US 12,546,492 B1
- Partially underground ventilation system for heating, cooling, and recirculating air of a nearby facility27 Jan 2026US 12,535,233 B2
- Playground air cooler23 Dec 2025US 12,504,182 B2
- Heating, ventilation, and air conditioning system and method26 Aug 2025US 12,398,914 B2GeoFlo Cooling, Inc.
- Solar power generation system29 Jul 2025US 12,375,034 B2TMEIC Corporation
- Temperature control system with a subsurface intake assembly, and a subsurface intake assembly for a temperature control system18 Jun 2026US 2026/0168683 A1
- Heating, Ventilation, and Air Conditioning System and Method9 Oct 2025US 2025/0314394 A1GeoFlo Cooling, Inc.
- Dual source heat pump system with mutual duct17 Jul 2025US 2025/0230946 A1Schlumberger Technology Corporation
- Playground air cooler26 Sep 2024US 2024/0318843 A1Independence Design Group
- Building air ventilation systems and methods22 Aug 2024US 2024/0280277 A1Wild Cat Team Ltd.
Most cited
By later US patents
- Environmentally heated and cooled pre-fabricated insulated concrete building63US 4,295,415 A1981
- Underground heating and cooling system48US 4,234,037 A1980
- Building structure for solar energy recovery and utilization41US 4,054,246 A1977
- Building air conditioning system using geothermal energy31US 6,293,120 B1Toko Kogyo Kabushiki Kaisha · 2001
- Long term storage and use of solar energy27US 4,373,573 A1983