F28F
Details of heat-exchange and heat-transfer apparatus, of general application
Official title: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
F28F (Details of heat-exchange and heat-transfer apparatus, of general application) appears on 23,598 US grants and 25,535 published applications in this corpus.
Search patents in F28F- Granted patents
- 23,598
- Published applications
- 25,535
- Assignees
- 7,809
- Inventors
- 44,665
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 176 | 0 |
| 1977 | 163 | 0 |
| 1978 | 204 | 0 |
| 1979 | 163 | 0 |
| 1980 | 227 | 0 |
| 1981 | 253 | 0 |
| 1982 | 232 | 0 |
| 1983 | 216 | 0 |
| 1984 | 250 | 0 |
| 1985 | 232 | 0 |
| 1986 | 260 | 0 |
| 1987 | 310 | 0 |
| 1988 | 265 | 0 |
| 1989 | 272 | 0 |
| 1990 | 230 | 0 |
| 1991 | 264 | 0 |
| 1992 | 280 | 0 |
| 1993 | 313 | 0 |
| 1994 | 313 | 0 |
| 1995 | 258 | 0 |
| 1996 | 312 | 0 |
| 1997 | 282 | 0 |
| 1998 | 397 | 0 |
| 1999 | 386 | 0 |
| 2000 | 383 | 0 |
| 2001 | 479 | 181 |
| 2002 | 397 | 485 |
| 2003 | 414 | 602 |
| 2004 | 390 | 665 |
| 2005 | 426 | 831 |
| 2006 | 541 | 789 |
| 2007 | 421 | 887 |
| 2008 | 312 | 879 |
| 2009 | 339 | 897 |
| 2010 | 419 | 1009 |
| 2011 | 409 | 992 |
| 2012 | 469 | 955 |
| 2013 | 504 | 1187 |
| 2014 | 532 | 1267 |
| 2015 | 682 | 1217 |
| 2016 | 751 | 1253 |
| 2017 | 950 | 1270 |
| 2018 | 1040 | 1316 |
| 2019 | 1251 | 1371 |
| 2020 | 1119 | 1355 |
| 2021 | 1028 | 1204 |
| 2022 | 972 | 1225 |
| 2023 | 868 | 1077 |
| 2024 | 929 | 1032 |
| 2025 | 833 | 924 |
| 2026 | 482 | 665 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F28F 9/00Casings7,294
- F28F 3/00Plate-like or laminated elements5,009
- F28F 1/00Tubular elements4,855
- F28F 13/00Arrangements for modifying heat-transfer4,360
- F28F 21/00Constructions of heat-exchange apparatus characterised by the selection of particular materials3,118
- F28F 2275/00FasteningIndexing code1,832
- F28F 27/00Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus1,798
- F28F 19/00Preventing the formation of deposits or corrosion1,611
All 30 main groupsShow fewer
- F28F 2250/00Arrangements for modifying the flow of the heat exchange mediaIndexing code1,470
- F28F 2265/00Safety or protection arrangementsIndexing code1,393
- F28F 2255/00Heat exchanger elements made of materials having special features or resulting fromIndexing code1,119
- F28F 2215/00FinsIndexing code927
- F28F 25/00Component parts of trickle coolers781
- F28F 2260/00Heat exchangers or heat exchange elements having special sizeIndexing code640
- F28F 2280/00Mounting arrangementsIndexing code618
- F28F 7/00Elements not covered by group f28f1/00, f28f3/00 or f28f5/00616
- F28F 2245/00CoatingsIndexing code571
- F28F 2210/00Heat exchange conduitsIndexing code533
- F28F 2225/00Reinforcing meansIndexing code531
- F28F 17/00Removing ice or water from heat-exchange apparatus493
- F28F 2270/00Thermal insulationIndexing code358
- F28F 2230/00Sealing meansIndexing code319
- F28F 5/00Elements specially adapted for movement293
- F28F 2240/00Spacing meansIndexing code262
- F28F 11/00Arrangements for sealing leaky tubes and conduits230
- F28F 2200/00PredictionIndexing code228
- F28F 2220/00Closure meansIndexing code228
- F28F 23/00Features relating to the use of intermediate heat-exchange materials185
- F28F 2235/00Means for filling gaps between elementsIndexing code34
- F28F 99/00Subject matter not provided for in other groups of this subclass20
Recent patents
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- Economizer and boiler8 Oct 2026US 2026/0309323 A1Kurita Water Industries Ltd.
- Sheet membrane apparatus8 Oct 2026US 2026/0309425 A1Baltimore Aircoil Company, Inc.
- Heat exchanger for automobiles8 Oct 2026US 2026/0309427 A1Estra Automotive Systems Co., Ltd.
- Heat exchanger8 Oct 2026US 2026/0309428 A1Hanon Systems
- Falling film evaporator8 Oct 2026US 2026/0309429 A1Bitzer Kuhlmaschinenbau GmbH
Most cited
By later US patents
- Computing infrastructure672US 8,706,914 B22014
- Forming structures from CAD solid models580US 6,391,251 B1Optomec Design Company · 2002
- Apparatus for absorbing and dissipating excess heat generated by a system553US 7,593,230 B2Sensys Medical, Inc. · 2009
- Cooling disk unit for use in a wafer chucking device535US 6,499,533 B2Sumitomo Heavy Industries, Ltd. · 2002
- Thermal transfer coating486US 7,695,808 B23M Innovative Properties Company · 2010