F24H 1/41
In serpentine form
Official title: in serpentine form
F24H1/41 (In serpentine form) appears on 38 US grants and 32 published applications in this corpus.
Search patents in F24H- Granted patents
- 38
- Published applications
- 32
- Assignees
- 19
- Inventors
- 74
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 2 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 1 | 5 |
| 2018 | 1 | 1 |
| 2019 | 3 | 3 |
| 2020 | 2 | 3 |
| 2021 | 2 | 4 |
| 2022 | 5 | 1 |
| 2023 | 2 | 1 |
| 2024 | 0 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Heat exchanger2 Dec 2025US 12,487,035 B2Rinnai Corporation
- Heat exchanger and water heating device including the same18 Mar 2025US 12,253,311 B2Noritz Corporation
- Heat exchanger and manufacturing method therefor10 Oct 2023US 11,779,994 B2Noritz Corporation
- Heat exchanger and water heating device including the same11 Apr 2023US 11,624,526 B2Noritz Corporation
- Systems and methods for agitating fuel within a heat exchanger27 Sep 2022US 11,454,391 B2Central Boiler, Inc.
- Water heater26 Sep 2024US 2024/0318868 A1Noritz Corporation
- Heat Exchanger15 Aug 2024US 2024/0271885 A1Rinnai Corporation
- Heat exchanger and water heating device including the same26 Jan 2023US 2023/0026734 A1Noritz Corporation
- Heat exchanger and manufacturing method therefor29 Dec 2022US 2022/0410247 A1Noritz Corporation
- Heat exchange apparatus and method16 Dec 2021US 2021/0389061 A1UT-Battelle, LLC
Most cited
By later US patents
- Staged combustion in a porous-matrix surface combustor to promote ultra-low NO.sub.x Emissions42US 5,476,375 AInstitute of Gas Technology · 1995
- Gas-fired, porous matrix, surface combustor-fluid heater23US 5,375,563 AInstitute of Gas Technology · 1994
- Heating system19US 8,910,880 B2Zenex Technologies Limited · 2014
- Instant hot water boiler structure16US 5,775,267 A1998
- Wood burning automatic swimming pool heater13US 4,088,113 A1978