F28D 20/00
Heat storage plants or apparatus in general
Official title: Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
F28D20/00 (Heat storage plants or apparatus in general) appears on 3,112 US grants and 3,524 published applications in this corpus.
Search patents in F28D- Granted patents
- 3,112
- Published applications
- 3,524
- Assignees
- 1,747
- Inventors
- 7,088
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 34 | 0 |
| 1978 | 40 | 0 |
| 1979 | 48 | 0 |
| 1980 | 45 | 0 |
| 1981 | 71 | 0 |
| 1982 | 39 | 0 |
| 1983 | 54 | 0 |
| 1984 | 39 | 0 |
| 1985 | 43 | 0 |
| 1986 | 29 | 0 |
| 1987 | 24 | 0 |
| 1988 | 19 | 0 |
| 1989 | 25 | 0 |
| 1990 | 24 | 0 |
| 1991 | 28 | 0 |
| 1992 | 28 | 0 |
| 1993 | 27 | 0 |
| 1994 | 25 | 0 |
| 1995 | 38 | 0 |
| 1996 | 27 | 0 |
| 1997 | 33 | 0 |
| 1998 | 26 | 0 |
| 1999 | 38 | 0 |
| 2000 | 45 | 0 |
| 2001 | 50 | 9 |
| 2002 | 31 | 47 |
| 2003 | 36 | 53 |
| 2004 | 40 | 58 |
| 2005 | 30 | 61 |
| 2006 | 35 | 52 |
| 2007 | 37 | 74 |
| 2008 | 19 | 73 |
| 2009 | 24 | 92 |
| 2010 | 46 | 128 |
| 2011 | 53 | 151 |
| 2012 | 41 | 140 |
| 2013 | 60 | 153 |
| 2014 | 62 | 148 |
| 2015 | 92 | 214 |
| 2016 | 101 | 192 |
| 2017 | 121 | 178 |
| 2018 | 149 | 215 |
| 2019 | 191 | 210 |
| 2020 | 162 | 204 |
| 2021 | 174 | 166 |
| 2022 | 137 | 208 |
| 2023 | 139 | 191 |
| 2024 | 160 | 204 |
| 2025 | 165 | 189 |
| 2026 | 92 | 114 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F28D 20/02Heat storage plants or apparatus in general: using latent heat1,636
- F28D 20/0034Heat storage plants or apparatus in general: using liquid heat storage material729
- F28D 2020/0065DetailsIndexing code567
- F28D 2020/0004Particular heat storage apparatusIndexing code447
- F28D 20/0056Heat storage plants or apparatus in general: using solid heat storage material442
- F28D 20/003Heat storage plants or apparatus in general: using thermochemical reactions274
- F28D 20/0052Heat storage plants or apparatus in general: using the ground body or197
- F28D 2020/006Heat storage systems not otherwise provided forIndexing code93
Recent patents
- Thermal energy storage system coupled with a solid oxide electrolysis system6 Oct 2026US 12,753,710 B2Rondo Energy, Inc.
- Dual cooperative induction temperature control device and control method for micro-nano impact indentation tester6 Oct 2026US 12,757,300 B2Jilin University
- Granulated particle for cold storage material particle, cold storage material particle, cold storage device, refrigerator, cryopump superconducting magnet, nuclear magnetic resonance imaging apparatus, nuclear magnetic resonance apparatus, magnetic field application type single crystal pulling apparatus, and helium re-condensing device29 Sep 2026US 12,747,380 B2Niterra Materials Co., Ltd.
- Compacted thermochemical heat storage bodies29 Sep 2026US 12,747,381 B2Caldic Benelux NV
- Heat exchange system to transfer waste heat from electrical load to compressed air energy storage system29 Sep 2026US 12,747,693 B1Brightnight Power LLC
- Separation and heat transfer systems8 Oct 2026US 2026/0309430 A1Solvcor Technologies LLC
- Thermal energy storage8 Oct 2026US 2026/0309431 A1Magaldi Power S.P.A.
- Microencapsulated phase change material slurry cooling system and method of operation8 Oct 2026US 2026/0309432 A1Northrop Grumman Corporation
- Thermal storage and power generation systems and methods1 Oct 2026US 2026/0298140 A1247Solar Inc.
- Fluid reactor device and method for operating a fluid reactor device1 Oct 2026US 2026/0298550 A1Dürr Systems AG
Most cited
By later US patents
- Ergonomic systems and methods providing intelligent adaptive surfaces and temperature control392US 6,230,501 B1ProMXD Technology, Inc. · 2001
- Orthopedic device having gel pad with phase change material298US 4,964,402 ARoyce Medical Company · 1990
- Ergonomic systems and methods providing intelligent adaptive surfaces and temperature control226US 6,865,825 B2ProMDX Technology, Inc. · 2005
- Phase change material thermal capacitor clothing196US 6,855,410 B22005
- Thermal wraps193US 5,005,374 AChillynex Corporation · 1991