F01K 23/08
With working fluid of one cycle heating the fluid in another cycle
Official title: with working fluid of one cycle heating the fluid in another cycle
F01K23/08 (With working fluid of one cycle heating the fluid in another cycle) appears on 81 US grants and 88 published applications in this corpus.
Search patents in F01K- Granted patents
- 81
- Published applications
- 88
- Assignees
- 56
- Inventors
- 161
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 3 |
| 2005 | 3 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 5 |
| 2013 | 1 | 3 |
| 2014 | 2 | 5 |
| 2015 | 4 | 5 |
| 2016 | 2 | 7 |
| 2017 | 6 | 12 |
| 2018 | 6 | 8 |
| 2019 | 12 | 7 |
| 2020 | 6 | 6 |
| 2021 | 7 | 4 |
| 2022 | 4 | 6 |
| 2023 | 7 | 3 |
| 2024 | 3 | 5 |
| 2025 | 3 | 3 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thermal energy storage systems with an energy emitting surface21 Jul 2026US 12,687,120 B1Rondo Energy, Inc.
- Organic Rankine cycle decompression heat engine6 Jan 2026US RE50,731 E1Heat Source Energy Corp.
- Systems and methods utilizing gas temperature as a power source28 Oct 2025US 12,454,896 B2ICE Thermal Harvesting, LLC
- Pumped heat energy storage system integrated with coal-fired energy generation unit30 Sep 2025US 12,428,979 B2Malta Inc.
- Thermal storage and power generation systems and methods for electrical power source management22 Apr 2025US 12,281,612 B2247Solar Inc.
- Systems and methods utilizing gas temperature as a power source22 Jan 2026US 2026/0022647 A1ICE Thermal Harvesting, LLC
- Pumped heat energy storage system integrated with coal-fired energy generation unit1 Jan 2026US 2026/0002453 A1Malta Inc.
- Thermal storage and power generation systems and methods11 Sep 2025US 2025/0283430 A1247Solar Inc.
- Heat and power cogeneration system31 Jul 2025US 2025/0243789 A1Practical Solutions LLC
- Pumped heat energy storage system integrated with coal-fired energy generation unit10 Apr 2025US 2025/0116211 A1Malta Inc.
Most cited
By later US patents
- Integrated air separation process103US 6,282,901 B1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 2001
- Purification works for thermal power plant86US 7,559,977 B2Sargas AS · 2009
- Combined rankine and vapor compression cycles50US 6,880,344 B2UTC Power Corporation · 2005
- Low emission thermal plant47US 7,328,581 B2Sargas AS · 2008
- Organic rankine cycle decompression heat engine46US 9,745,870 B2Heat Source Energy Corp. · 2017