F24H 1/20
With immersed heating elements
Official title: with immersed heating elements, e.g. electric elements or furnace tubes
F24H1/20 (With immersed heating elements) appears on 827 US grants and 789 published applications in this corpus.
Search patents in F24H- Granted patents
- 827
- Published applications
- 789
- Assignees
- 353
- Inventors
- 1,483
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 17 | 0 |
| 1982 | 6 | 0 |
| 1983 | 9 | 0 |
| 1984 | 15 | 0 |
| 1985 | 15 | 0 |
| 1986 | 6 | 0 |
| 1987 | 17 | 0 |
| 1988 | 6 | 0 |
| 1989 | 14 | 0 |
| 1990 | 21 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 13 | 0 |
| 1994 | 10 | 0 |
| 1995 | 5 | 0 |
| 1996 | 12 | 0 |
| 1997 | 12 | 0 |
| 1998 | 16 | 0 |
| 1999 | 15 | 0 |
| 2000 | 19 | 0 |
| 2001 | 18 | 8 |
| 2002 | 16 | 8 |
| 2003 | 20 | 14 |
| 2004 | 12 | 12 |
| 2005 | 19 | 19 |
| 2006 | 14 | 21 |
| 2007 | 13 | 21 |
| 2008 | 13 | 22 |
| 2009 | 12 | 31 |
| 2010 | 19 | 37 |
| 2011 | 11 | 20 |
| 2012 | 19 | 27 |
| 2013 | 11 | 37 |
| 2014 | 21 | 40 |
| 2015 | 23 | 29 |
| 2016 | 23 | 37 |
| 2017 | 29 | 44 |
| 2018 | 28 | 48 |
| 2019 | 45 | 55 |
| 2020 | 42 | 62 |
| 2021 | 41 | 42 |
| 2022 | 36 | 38 |
| 2023 | 26 | 27 |
| 2024 | 24 | 31 |
| 2025 | 22 | 36 |
| 2026 | 11 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for avoiding critical operating conditions of a liquid tank device and liquid tank device25 Aug 2026US 12,717,358 B2Brita LP
- Water heaters with computing elements as a network11 Aug 2026US 12,704,888 B2
- Electric boiler device based on utilization of residual energy of elevator, and control method19 May 2026US 12,631,346 B2Zhejiang University of Technology
- Heat exchanger baffles and methods for manufacturing the same19 May 2026US 12,631,409 B2Bradford White Corporation
- Water heater controller7 Apr 2026US 12,595,934 B2Rheem Australia Pty Limited
- Baffle for condensing flue tubes within a water heating appliance8 Oct 2026US 2026/0309367 A1Bradford White Corporation
- Water supply unit and aircraft having a water supply unit24 Sep 2026US 2026/0287209 A1Airbus Operations GmbH
- Boost Heat Pump Water Heater3 Sep 2026US 2026/0258970 A1Rheem Manufacturing Company
- Water heater and methods for operating the same3 Sep 2026US 2026/0258971 A1Bradford White Corporation
- Water heater and methods for operating the same3 Sep 2026US 2026/0258972 A1Bradford White Corporation
Most cited
By later US patents
- Control system for a water heater150US 5,797,358 AAOS Holding Company · 1998
- Combustion burner for a water heater87US 6,036,480 AAOS Holding Company · 2000
- Hot water dispenser having improved water temperature control system73US 4,978,833 ABunn-O-Matic Corporation · 1990
- Water heater with integral burner71US 5,355,841 ASABH (U.S.) Water Heater Group, Inc. · 1994
- Fast recovery electric fluid68US 4,458,138 A1984