F28D 21/0001
Recuperative heat exchangers
Official title: {Recuperative heat exchangers}
F28D21/0001 (Recuperative heat exchangers) appears on 1,420 US grants and 1,643 published applications in this corpus.
Search patents in F28D- Granted patents
- 1,420
- Published applications
- 1,643
- Assignees
- 800
- Inventors
- 3,358
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 14 | 0 |
| 1978 | 19 | 0 |
| 1979 | 18 | 0 |
| 1980 | 20 | 0 |
| 1981 | 28 | 0 |
| 1982 | 27 | 0 |
| 1983 | 29 | 0 |
| 1984 | 29 | 0 |
| 1985 | 21 | 0 |
| 1986 | 18 | 0 |
| 1987 | 19 | 0 |
| 1988 | 8 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 11 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 16 | 7 |
| 2002 | 14 | 12 |
| 2003 | 13 | 27 |
| 2004 | 15 | 22 |
| 2005 | 13 | 37 |
| 2006 | 29 | 37 |
| 2007 | 19 | 51 |
| 2008 | 12 | 64 |
| 2009 | 14 | 55 |
| 2010 | 24 | 59 |
| 2011 | 28 | 62 |
| 2012 | 23 | 89 |
| 2013 | 35 | 90 |
| 2014 | 41 | 87 |
| 2015 | 56 | 106 |
| 2016 | 61 | 112 |
| 2017 | 76 | 126 |
| 2018 | 92 | 88 |
| 2019 | 118 | 117 |
| 2020 | 85 | 89 |
| 2021 | 70 | 66 |
| 2022 | 67 | 68 |
| 2023 | 58 | 61 |
| 2024 | 47 | 44 |
| 2025 | 50 | 34 |
| 2026 | 19 | 33 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Laminate11 Aug 2026US 12,703,777 B2Daicel Corporation
- Energy recovery system11 Aug 2026US 12,704,329 B2
- Heat exchanger unit and method for fluid to passively bypassing a heat exchanger28 Jul 2026US 12,693,079 B2Bosal Flanders NV
- Plate heat exhanger arrangement, use of it in exhaust gas heat recovery and method for recovering heat from exhaust gas7 Jul 2026US 12,674,625 B2Vahterus Oy
- Method for the cooling and heat recovery from materials at very high temperature9 Jun 2026US 12,649,690 B2Cicsa S.R.L.
- Exhaust heat recovery device8 Oct 2026US 2026/0309067 A1
- Heat reclamation multiple waste tanks at each stage10 Sep 2026US 2026/0266562 A1Tokyo Electron Limited
- High temperature heat pumps10 Sep 2026US 2026/0266563 A1TerraPower, LLC
- Heat exchanger3 Sep 2026US 2026/0259010 A1Komatsu Ltd.
- High-efficiency waste heat recovery sizing machine27 Aug 2026US 2026/0251393 A1Shaoxing Yongfeng Energy Saving Technology Co., Ltd.
Most cited
By later US patents
- Cooling air cooler for a gas turbofan engine192US 4,254,618 AGeneral Electric Company · 1981
- Hydraulic fracturing system and method179US 9,840,897 B22017
- Precooling heat exchange arrangement integral with mounting structure fairing of gas turbine engine104US 5,123,242 AGeneral Electric Company · 1992
- Devices using a medium having a high heat transfer rate103US 7,220,365 B2New Qu Energy Ltd. · 2007
- Tubular heat exchange systems97US 9,200,855 B2Honeywell International Inc. · 2015