F01K 3/00
Plants characterised by the use of steam or heat accumulators, or intermediate
Official title: Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K19/00)
F01K3/00 (Plants characterised by the use of steam or heat accumulators, or intermediate) appears on 1,019 US grants and 1,029 published applications in this corpus.
Search patents in F01K- Granted patents
- 1,019
- Published applications
- 1,029
- Assignees
- 511
- Inventors
- 1,792
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 27 | 0 |
| 1977 | 13 | 0 |
| 1978 | 21 | 0 |
| 1979 | 15 | 0 |
| 1980 | 9 | 0 |
| 1981 | 15 | 0 |
| 1982 | 11 | 0 |
| 1983 | 9 | 0 |
| 1984 | 12 | 0 |
| 1985 | 5 | 0 |
| 1986 | 11 | 0 |
| 1987 | 17 | 0 |
| 1988 | 6 | 0 |
| 1989 | 11 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 7 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 2 |
| 2003 | 4 | 8 |
| 2004 | 9 | 6 |
| 2005 | 5 | 10 |
| 2006 | 7 | 12 |
| 2007 | 3 | 13 |
| 2008 | 12 | 17 |
| 2009 | 3 | 28 |
| 2010 | 9 | 30 |
| 2011 | 17 | 45 |
| 2012 | 15 | 43 |
| 2013 | 20 | 42 |
| 2014 | 34 | 70 |
| 2015 | 31 | 80 |
| 2016 | 43 | 58 |
| 2017 | 87 | 81 |
| 2018 | 63 | 77 |
| 2019 | 74 | 41 |
| 2020 | 41 | 40 |
| 2021 | 54 | 37 |
| 2022 | 38 | 70 |
| 2023 | 50 | 69 |
| 2024 | 75 | 64 |
| 2025 | 44 | 57 |
| 2026 | 37 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01K 3/18Plants characterised by the use of steam or heat accumulators, or intermediate647
- F01K 3/12Plants characterised by the use of steam or heat accumulators, or intermediate209
- F01K 3/02Use of accumulators and specific engine types156
- F01K 3/08Use of accumulators and the plant being specially adapted for a specific118
- F01K 3/004Accumulation in the liquid branch of the circuit56
- F01K 3/14Plants characterised by the use of steam or heat accumulators, or intermediate47
- F01K 3/06The engine being of extraction or non-condensing type38
- F01K 3/006Accumulators and steam compressors29
All 10 subgroupsShow fewer
Recent patents
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- Plant and process for energy management1 Oct 2026US 2026/0298112 A1Energy Dome S.P.A.
- 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
- Plant control device and calculation amount changeability determination method30 Jul 2026US 2026/0221771 A1Hitachi, 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
- Power plant using CO.sub.2 as a working fluid175US 4,765,143 ACBI Research Corporation · 1988
- Method and system for maintaining operating temperatures in a molten salt co-generating unit166US 4,438,630 ACombustion Engineering, Inc. · 1984
- High efficiency absorption heat pump and methods of use143US 7,313,926 B2Rexorce Thermionics, Inc. · 2008
- Thermal energy storage by means of reversible heat pumping138US 4,089,744 AExxon Research & Engineering Co. · 1978