F28D 21/00
Heat-exchange apparatus not covered by any of the groups f28d1/00 - f28d20/00
Official title: Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
F28D21/00 (Heat-exchange apparatus not covered by any of the groups f28d1/00 - f28d20/00) appears on 7,351 US grants and 9,523 published applications in this corpus.
Search patents in F28D- Granted patents
- 7,351
- Published applications
- 9,523
- Assignees
- 3,190
- Inventors
- 17,311
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 26 | 0 |
| 1977 | 32 | 0 |
| 1978 | 34 | 0 |
| 1979 | 31 | 0 |
| 1980 | 40 | 0 |
| 1981 | 60 | 0 |
| 1982 | 47 | 0 |
| 1983 | 45 | 0 |
| 1984 | 54 | 0 |
| 1985 | 52 | 0 |
| 1986 | 37 | 0 |
| 1987 | 48 | 0 |
| 1988 | 34 | 0 |
| 1989 | 25 | 0 |
| 1990 | 27 | 0 |
| 1991 | 35 | 0 |
| 1992 | 51 | 0 |
| 1993 | 50 | 0 |
| 1994 | 49 | 0 |
| 1995 | 39 | 0 |
| 1996 | 46 | 0 |
| 1997 | 28 | 0 |
| 1998 | 67 | 0 |
| 1999 | 50 | 0 |
| 2000 | 65 | 0 |
| 2001 | 89 | 39 |
| 2002 | 84 | 104 |
| 2003 | 104 | 148 |
| 2004 | 100 | 161 |
| 2005 | 107 | 209 |
| 2006 | 142 | 230 |
| 2007 | 116 | 272 |
| 2008 | 69 | 264 |
| 2009 | 80 | 233 |
| 2010 | 113 | 232 |
| 2011 | 128 | 277 |
| 2012 | 126 | 351 |
| 2013 | 153 | 361 |
| 2014 | 171 | 432 |
| 2015 | 213 | 417 |
| 2016 | 261 | 505 |
| 2017 | 343 | 560 |
| 2018 | 405 | 579 |
| 2019 | 543 | 613 |
| 2020 | 483 | 653 |
| 2021 | 486 | 553 |
| 2022 | 469 | 618 |
| 2023 | 425 | 552 |
| 2024 | 449 | 451 |
| 2025 | 414 | 418 |
| 2026 | 206 | 291 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Additively manufactured heat exchanger and diffuser pipe coupled to a compressor stage6 Oct 2026US 12,752,921 B2Hamilton Sundstrand Corporation
- Method, controller and system of controlling thermal power transfer through a thermal energy exchanger6 Oct 2026US 12,753,941 B2Belimo Holding AG
- Cooling module6 Oct 2026US 12,753,974 B2Hanon Systems
- Controllable injection for implementing different local refrigerant distribution6 Oct 2026US 12,753,975 B2Linde Aktiengesellschaft
- Cold plate and method for manufacturing cold plate6 Oct 2026US 12,753,978 B2Fujikura Ltd.
- Exhaust heat recovery device8 Oct 2026US 2026/0309067 A1
- Sheet membrane apparatus8 Oct 2026US 2026/0309425 A1Baltimore Aircoil Company, Inc.
- Falling film evaporator8 Oct 2026US 2026/0309429 A1Bitzer Kuhlmaschinenbau GmbH
- Heat exchanger8 Oct 2026US 2026/0309434 A1
- Radiator-type device with heat pipe for comfortable heating and cooling1 Oct 2026US 2026/0298545 A1Enover Isi Sistemleri Anonim Sirketi
Most cited
By later US patents
- Ergonomic systems and methods providing intelligent adaptive surfaces and temperature control392US 6,230,501 B1ProMXD Technology, Inc. · 2001
- Integrated multilayered microfludic devices and methods for making the same242US 6,572,830 B1Motorola, Inc. · 2003
- Multilayered microfluidic DNA analysis system and method238US 6,544,734 B12003
- Ergonomic systems and methods providing intelligent adaptive surfaces and temperature control226US 6,865,825 B2ProMDX Technology, Inc. · 2005
- Multi-channel optical detection system202US 6,369,893 B1Cepheid · 2002