F24H
Fluid heaters
Official title: FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL (steam generation F22)
F24H (Fluid heaters) appears on 7,686 US grants and 7,682 published applications in this corpus.
Search patents in F24H- Granted patents
- 7,686
- Published applications
- 7,682
- Assignees
- 3,118
- Inventors
- 13,617
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 65 | 0 |
| 1977 | 74 | 0 |
| 1978 | 71 | 0 |
| 1979 | 76 | 0 |
| 1980 | 86 | 0 |
| 1981 | 108 | 0 |
| 1982 | 100 | 0 |
| 1983 | 115 | 0 |
| 1984 | 116 | 0 |
| 1985 | 110 | 0 |
| 1986 | 104 | 0 |
| 1987 | 118 | 0 |
| 1988 | 111 | 0 |
| 1989 | 123 | 0 |
| 1990 | 145 | 0 |
| 1991 | 112 | 0 |
| 1992 | 92 | 0 |
| 1993 | 100 | 0 |
| 1994 | 133 | 0 |
| 1995 | 95 | 0 |
| 1996 | 97 | 0 |
| 1997 | 72 | 0 |
| 1998 | 99 | 0 |
| 1999 | 117 | 0 |
| 2000 | 142 | 0 |
| 2001 | 121 | 25 |
| 2002 | 94 | 83 |
| 2003 | 110 | 107 |
| 2004 | 97 | 117 |
| 2005 | 111 | 153 |
| 2006 | 104 | 150 |
| 2007 | 65 | 172 |
| 2008 | 75 | 173 |
| 2009 | 76 | 221 |
| 2010 | 99 | 260 |
| 2011 | 103 | 284 |
| 2012 | 146 | 316 |
| 2013 | 157 | 343 |
| 2014 | 202 | 395 |
| 2015 | 198 | 407 |
| 2016 | 277 | 417 |
| 2017 | 303 | 338 |
| 2018 | 322 | 436 |
| 2019 | 376 | 421 |
| 2020 | 338 | 433 |
| 2021 | 297 | 449 |
| 2022 | 352 | 414 |
| 2023 | 315 | 358 |
| 2024 | 301 | 452 |
| 2025 | 275 | 433 |
| 2026 | 191 | 325 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F24H 1/00Water heaters3,601
- F24H 9/00Details3,542
- F24H 3/00Air heaters1,830
- F24H 15/00Control of fluid heaters1,802
- F24H 8/00Fluid heaters characterised by means for extracting latent heat from flue gases526
- F24H 4/00Fluid heaters characterised by the use of heat pumps442
- F24H 2250/00Electrical heat generating meansIndexing code251
- F24H 7/00Storage heaters, i.e. heaters in which the energy is stored as heat189
All 13 main groupsShow fewer
Recent patents
- Systems and methods for preventing and removing chemical deposits in a fluid heating device6 Oct 2026US 12,753,950 B2Rheem Manufacturing Company
- Heat exchanger6 Oct 2026US 12,753,977 B2Kyungdong Navien Co., Ltd.
- Water heater having highly efficient and compact heat exchanger6 Oct 2026US RE51,053 E1A. O. Smith Corporation
- Hot water storage tank29 Sep 2026US 12,747,891 B2Mitsubishi Electric Corporation
- Control of fluid temperature in a dialysis system22 Sep 2026US 12,741,070 B2Gambro Lundia AB
- Heating apparatus8 Oct 2026US 2026/0307461 A1Aisan Kogyo Kabushiki Kaisha
- Water detection, distribution and monitoring system8 Oct 2026US 2026/0308893 A1Ocean Park Mechanical Inc
- Economizer and boiler8 Oct 2026US 2026/0309323 A1Kurita Water Industries Ltd.
- Premixing device and combustion device comprising same8 Oct 2026US 2026/0309326 A1Noritz Corporation
- Energy buffering using a heat pump8 Oct 2026US 2026/0309339 A1Mixergy Limited
Most cited
By later US patents
- Electronic atomization cigarette779US 7,832,410 B2Best Partners Worldwide Limited · 2010
- Self-programmable temperature control system for a heating and cooling system328US 5,088,645 A1992
- Electronic atomization cigarette316US 8,393,331 B2Ruyan Investment (Holdings) Limited · 2013
- In-line fluid heating apparatus with gradation of heat energy from inlet to outlet313US 5,381,510 AIn-Touch Products Co. · 1995
- Thermal treatment apparatus310US 5,549,559 AArgomed Ltd. · 1996