F23L 17/02
Tops for chimneys or ventilating shafts
Official title: Tops for chimneys or ventilating shafts; Terminals for flues
F23L17/02 (Tops for chimneys or ventilating shafts) appears on 187 US grants and 129 published applications in this corpus.
Search patents in F23L- Granted patents
- 187
- Published applications
- 129
- Assignees
- 106
- Inventors
- 335
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 0 |
| 2002 | 5 | 6 |
| 2003 | 4 | 5 |
| 2004 | 4 | 3 |
| 2005 | 4 | 8 |
| 2006 | 5 | 6 |
| 2007 | 1 | 9 |
| 2008 | 1 | 7 |
| 2009 | 1 | 7 |
| 2010 | 5 | 6 |
| 2011 | 1 | 7 |
| 2012 | 4 | 2 |
| 2013 | 6 | 6 |
| 2014 | 5 | 8 |
| 2015 | 4 | 2 |
| 2016 | 5 | 8 |
| 2017 | 4 | 6 |
| 2018 | 7 | 3 |
| 2019 | 4 | 2 |
| 2020 | 2 | 3 |
| 2021 | 1 | 6 |
| 2022 | 5 | 7 |
| 2023 | 1 | 1 |
| 2024 | 6 | 3 |
| 2025 | 2 | 6 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23L 17/04Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with56
- F23L 17/10Wherein the top moves as a whole23
- F23L 17/12Devices for fastening the top or terminal to chimney, shaft, or flue20
- F23L 17/14Draining devices19
- F23L 17/08With coaxial cones or louvres12
- F23L 17/06Branched1
Recent patents
- Plumbing vent plug11 Aug 2026US 12,704,256 B2
- Nozzle assembly for exhaust fan unit of HVAC system19 May 2026US 12,631,353 B2Air Distribution Technologies IP, LLC
- Exhaust plume control structure and power generating plant including same24 Feb 2026US 12,560,322 B2General Electric Company
- Portable water heater26 Aug 2025US 12,398,918 B2Zhongshan Powtek Appliances Mfg., Ltd.
- Intake device for a chimney termination6 May 2025US 12,292,192 B2Rlh Industries, Inc.
- Combustion device2 Jul 2026US 2026/0185706 A1Rinnai Corporation
- Exhaust port member23 Apr 2026US 2026/0110431 A1Rinnai Corporation
- Intake device for a chimney termination20 Nov 2025US 2025/0354688 A1Rlh Industries, Inc.
- Chimney Sleeve6 Nov 2025US 2025/0341309 A1
- Plumbing vent plug17 Jul 2025US 2025/0230928 A1
Most cited
By later US patents