F24H 1/22
Water heaters other than continuous-flow or water-storage heaters
Official title: Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
F24H1/22 (Water heaters other than continuous-flow or water-storage heaters) appears on 834 US grants and 573 published applications in this corpus.
Search patents in F24H- Granted patents
- 834
- Published applications
- 573
- Assignees
- 394
- Inventors
- 1,348
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 15 | 0 |
| 1978 | 13 | 0 |
| 1979 | 12 | 0 |
| 1980 | 13 | 0 |
| 1981 | 17 | 0 |
| 1982 | 22 | 0 |
| 1983 | 30 | 0 |
| 1984 | 32 | 0 |
| 1985 | 19 | 0 |
| 1986 | 18 | 0 |
| 1987 | 20 | 0 |
| 1988 | 17 | 0 |
| 1989 | 23 | 0 |
| 1990 | 23 | 0 |
| 1991 | 9 | 0 |
| 1992 | 12 | 0 |
| 1993 | 10 | 0 |
| 1994 | 17 | 0 |
| 1995 | 12 | 0 |
| 1996 | 13 | 0 |
| 1997 | 8 | 0 |
| 1998 | 15 | 0 |
| 1999 | 12 | 0 |
| 2000 | 25 | 0 |
| 2001 | 9 | 1 |
| 2002 | 10 | 6 |
| 2003 | 14 | 11 |
| 2004 | 8 | 8 |
| 2005 | 5 | 7 |
| 2006 | 7 | 17 |
| 2007 | 4 | 15 |
| 2008 | 7 | 15 |
| 2009 | 5 | 22 |
| 2010 | 15 | 27 |
| 2011 | 7 | 25 |
| 2012 | 10 | 35 |
| 2013 | 12 | 24 |
| 2014 | 28 | 35 |
| 2015 | 14 | 29 |
| 2016 | 13 | 26 |
| 2017 | 25 | 39 |
| 2018 | 32 | 44 |
| 2019 | 42 | 39 |
| 2020 | 25 | 36 |
| 2021 | 30 | 27 |
| 2022 | 28 | 29 |
| 2023 | 23 | 20 |
| 2024 | 18 | 21 |
| 2025 | 15 | 10 |
| 2026 | 9 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F24H 1/40With water tube or tubes395
- F24H 1/24With water mantle surrounding the combustion chamber or chambers367
- F24H 1/44With combinations of two or more of the types covered by groups103
- F24H 1/34With water chamber arranged adjacent to the combustion chamber or chambers66
- F24H 1/225Electrical central heating boilers49
- F24H 1/38With water contained in separate elements31
Recent patents
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- Condensation heat exchanger7 Jul 2026US 12,674,602 B2Sermeta
- Immersion cooling system with phoretic force particulate collection30 Jun 2026US 12,672,256 B2Intel Corporation
- Electric boiler5 May 2026US 12,618,589 B2
- Boiler for making hot water and room heating water available simultaneously17 Mar 2026US 12,578,120 B2
- Integrated Anode For A Heat Exchanger18 Jun 2026US 2026/0168701 A1Rheem Manufacturing Company
- Fired process heater with a manifold support assembly11 Jun 2026US 2026/0160415 A1Zeeco, Inc.
- Instantaneous water heater12 Feb 2026US 2026/0043582 A1
- Diffuser for thermal storage tank5 Feb 2026US 2026/0036334 A1A. O. Smith Corporation
- Sieve element of a tubular heat exchanger and its use in a tubular heat exchanger22 Jan 2026US 2026/0022901 A1Aic Spolka Akcyjna
Most cited
By later US patents
- Pulsing combustion116US 4,569,310 AArkansas Patents, Inc. · 1986
- Low NO.sub.x multistage combustor110US 6,089,855 AThermo Power Corporation · 2000
- Oil-fired frac water heater92US 8,534,235 B22013
- Pulsing combustion90US 4,479,484 AArkansas Patents, Inc. · 1984
- Pulsing combustion90US 4,651,712 AArkansas Patents, Inc. · 1987