F23N 2241/04
Heating water
F23N2241/04 (Heating water) appears on 128 US grants and 144 published applications in this corpus.
Search patents in F23N- Granted patents
- 128
- Published applications
- 144
- Assignees
- 75
- Inventors
- 296
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 3 | 2 |
| 2005 | 4 | 5 |
| 2006 | 0 | 3 |
| 2007 | 2 | 2 |
| 2008 | 1 | 8 |
| 2009 | 2 | 8 |
| 2010 | 4 | 10 |
| 2011 | 4 | 7 |
| 2012 | 7 | 5 |
| 2013 | 5 | 3 |
| 2014 | 5 | 3 |
| 2015 | 3 | 5 |
| 2016 | 3 | 3 |
| 2017 | 5 | 9 |
| 2018 | 6 | 7 |
| 2019 | 5 | 10 |
| 2020 | 10 | 11 |
| 2021 | 6 | 14 |
| 2022 | 11 | 7 |
| 2023 | 6 | 4 |
| 2024 | 5 | 7 |
| 2025 | 7 | 2 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fluid heating system with combustion trim learning14 Jul 2026US 12,680,727 B2A. O. Smith Corporation
- Premixing apparatus11 Nov 2025US 12,467,624 B2Rinnai Corporation
- Flame analytics system11 Nov 2025US 12,467,692 B2Honeywell International Inc.
- Method for evaluating a quasi-stationary pressure difference detectable by a sensor at a gas boiler, and associated gas boiler28 Oct 2025US 12,455,076 B2ebm-papst Landshut GmbH
- Digital gas valve burner control systems and methods29 Jul 2025US 12,372,245 B2Midea Group Co., Ltd.
- Combustion device and hot water device including same5 Mar 2026US 2026/0063330 A1Noritz Corporation
- Method and Apparatus for Detecting a Threshold Deviation from Clean Combustion in a Residential Gas Heater Assembly26 Feb 2026US 2026/0055891 A1
- Combustion system comprising an annular shroud burner5 Feb 2026US 2026/0036299 A1Jupiter Oxygen Corporation
- Dual Fuel Fluid Heating Systems and Methods15 Jan 2026US 2026/0016161 A1Rheem Manufacturing Company
- Water heater19 Jun 2025US 2025/0198656 A1Noritz Corporation
Most cited
By later US patents
- Hot water control73US 4,834,284 AFluidmaster, Inc. · 1989
- Rotary valve in a multi-gas cooker65US 7,156,370 B22007
- Multi-gas cooker, with a rotary valve provided with interchangeable regulating means57US 7,641,470 B2Coprecitec, S. L. · 2010
- Rotary valve arranged in a multi-gas cooker55US 7,651,330 B2Coprecitec, S. L. · 2010
- Control system for modulating water heater33US 7,506,617 B2Lochinvar, LLC · 2009