F01K 3/18
Plants characterised by the use of steam or heat accumulators, or intermediate
Official title: having heaters (having both steam accumulator and heater F01K3/14; steam heaters per se F22)
F01K3/18 (Plants characterised by the use of steam or heat accumulators, or intermediate) appears on 647 US grants and 618 published applications in this corpus.
Search patents in F01K- Granted patents
- 647
- Published applications
- 618
- Assignees
- 301
- Inventors
- 1,097
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 9 | 0 |
| 1978 | 13 | 0 |
| 1979 | 9 | 0 |
| 1980 | 2 | 0 |
| 1981 | 14 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 1 | 0 |
| 1986 | 11 | 0 |
| 1987 | 17 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 2 |
| 2002 | 2 | 2 |
| 2003 | 4 | 8 |
| 2004 | 7 | 4 |
| 2005 | 5 | 8 |
| 2006 | 4 | 8 |
| 2007 | 2 | 5 |
| 2008 | 3 | 7 |
| 2009 | 2 | 10 |
| 2010 | 6 | 13 |
| 2011 | 8 | 22 |
| 2012 | 6 | 20 |
| 2013 | 8 | 17 |
| 2014 | 18 | 30 |
| 2015 | 20 | 35 |
| 2016 | 15 | 26 |
| 2017 | 48 | 54 |
| 2018 | 32 | 56 |
| 2019 | 54 | 24 |
| 2020 | 19 | 19 |
| 2021 | 35 | 24 |
| 2022 | 26 | 60 |
| 2023 | 37 | 51 |
| 2024 | 57 | 46 |
| 2025 | 36 | 48 |
| 2026 | 30 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01K 3/186Using electric heat152
- F01K 3/185Using waste heat from outside the plant136
- F01K 3/188Using heat from a specified chemical reaction84
- F01K 3/24With heating by separately-fired heaters65
- F01K 3/20With heating by combustion gases of main boiler62
- F01K 3/26With heating by steam55
- F01K 3/181Using nuclear heat51
Recent patents
- Thermal energy storage system coupled with a solid oxide electrolysis system6 Oct 2026US 12,753,710 B2Rondo Energy, Inc.
- Thermal energy storage system coupled with thermal power cycle systems8 Sep 2026US 12,729,632 B1Rondo Energy, Inc.
- Thermal energy storage systems for use in material processing1 Sep 2026US 12,723,524 B2Rondo Energy, Inc.
- Integrated carbon sequestration and power generation system and methods of use1 Sep 2026US 12,723,540 B2Arbor Energy and Resources Corporation
- Thermodynamic cycle system with thermal plant integration1 Sep 2026US 12,723,542 B2Malta Inc.
- Ambient temperature thermal adapter for supercritical carbon dioxide power cycle8 Oct 2026US 2026/0309058 A1TerraPower, LLC
- Apparatus for thermal energy storage and plant for energy transformation and storage24 Sep 2026US 2026/0286867 A1Energy Dome S.P.A.
- Thermal energy storage and power shifting system10 Sep 2026US 2026/0266203 A1Holtec International
- Thermal Energy Storage with Fluid Flow Insulation16 Jul 2026US 2026/0201821 A1Rondo Energy, Inc.
- Nuclear Power Plant and Power Generation Method in Nuclear Power Plant2 Jul 2026US 2026/0188535 A1Hitachi-GE Nuclear Energy, Ltd.
Most cited
By later US patents
- Thermal energy storage by means of reversible heat pumping utilizing industrial waste heat198US 4,110,987 AExxon Research & Engineering Co. · 1978
- Method and system for maintaining operating temperatures in a molten salt co-generating unit166US 4,438,630 ACombustion Engineering, Inc. · 1984
- Zero emissions closed rankine cycle power system124US 7,882,692 B2Clean Energy Systems, Inc. · 2011
- Dispatchable combined cycle power plant121US 10,113,535 B22018
- Combination of supercritical wet combustion and compressed air energy storage112US 4,593,202 ADipac Associates · 1986