F24H 1/43
Helically or spirally coiled
Official title: helically or spirally coiled
F24H1/43 (Helically or spirally coiled) appears on 155 US grants and 123 published applications in this corpus.
Search patents in F24H- Granted patents
- 155
- Published applications
- 123
- Assignees
- 98
- Inventors
- 279
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 8 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 0 |
| 2003 | 5 | 4 |
| 2004 | 2 | 3 |
| 2005 | 1 | 1 |
| 2006 | 2 | 6 |
| 2007 | 3 | 8 |
| 2008 | 1 | 5 |
| 2009 | 4 | 2 |
| 2010 | 4 | 2 |
| 2011 | 2 | 4 |
| 2012 | 1 | 6 |
| 2013 | 3 | 3 |
| 2014 | 4 | 7 |
| 2015 | 5 | 10 |
| 2016 | 5 | 5 |
| 2017 | 5 | 6 |
| 2018 | 7 | 11 |
| 2019 | 8 | 8 |
| 2020 | 3 | 6 |
| 2021 | 6 | 3 |
| 2022 | 2 | 6 |
| 2023 | 6 | 4 |
| 2024 | 3 | 9 |
| 2025 | 5 | 2 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Condensation heat exchanger7 Jul 2026US 12,674,602 B2Sermeta
- Boiler for making hot water and room heating water available simultaneously17 Mar 2026US 12,578,120 B2
- System for producing heat for domestic hot water or central heating3 Feb 2026US 12,540,737 B2Daikin Europe N.V.
- Condensation heat exchanger25 Nov 2025US 12,480,724 B2Sermeta
- Heat exchanger18 Nov 2025US 12,474,123 B2Sermeta
- Instantaneous water heater12 Feb 2026US 2026/0043582 A1
- Boiler, in particular a condensing boiler, comprising a heat exchanger27 Nov 2025US 2025/0362056 A1RIELLO S.p.A.
- Boiler and use thereof30 Jan 2025US 2025/0035338 A1La Nuova Coterm Srl
- Condensation Heat Exchanger24 Oct 2024US 2024/0353145 A1Sermeta
- Heat Exchanger10 Oct 2024US 2024/0337448 A1Sermeta
Most cited
By later US patents
- High efficiency commercial water heater53US 5,687,678 AWeben-Jarco, Inc. · 1997
- Advanced emissive matrix combustion46US 6,159,001 AThe Quantum Group, Inc. · 2000
- Heating system44US 6,109,339 AFirst Co. · 2000
- Integrated space heating, air conditioning and potable water heating appliance43US 4,798,240 AGas Research Institute · 1989
- Burner for a gas and air mixture41US 6,997,701 B2GVP Gesellschaft zur Vermarketing der Porenbrennertechnik mbH · 2006