F24H 1/46
Water heaters having plural combustion chambers
F24H1/46 (Water heaters having plural combustion chambers) appears on 22 US grants and 24 published applications in this corpus.
Search patents in F24H- Granted patents
- 22
- Published applications
- 24
- Assignees
- 16
- Inventors
- 72
- Latest grant
- 25 Jun 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 3 |
| 2009 | 0 | 2 |
| 2010 | 1 | 2 |
| 2011 | 2 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 2 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 2 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 0 | 1 |
| 2020 | 2 | 2 |
| 2021 | 2 | 4 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
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- System and method for determining heat transfer capacity of an indirect water heater20 Nov 2025US 2025/0354722 A1Laars Heating Systems Company
- Integrated Pressure Condensing Boiler26 Jan 2023US 2023/0027757 A1Langfang Jinhua Boiler Co., Ltd.
- Combustion device25 Nov 2021US 2021/0364192 A1Rinnai Corporation
- Gas manifold23 Sep 2021US 2021/0293453 A1Rinnai Corporation
- Water heating apparatus and method for controlling the apparatus24 Jun 2021US 2021/0190377 A1Kyungdong Navien Co., Ltd.
Most cited
By later US patents