F23L 17/00
Inducing draught
Official title: Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
F23L17/00 (Inducing draught) appears on 423 US grants and 307 published applications in this corpus.
Search patents in F23L- Granted patents
- 423
- Published applications
- 307
- Assignees
- 208
- Inventors
- 755
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 11 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 11 | 0 |
| 1984 | 13 | 0 |
| 1985 | 8 | 0 |
| 1986 | 4 | 0 |
| 1987 | 11 | 0 |
| 1988 | 11 | 0 |
| 1989 | 4 | 0 |
| 1990 | 9 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 8 | 0 |
| 1997 | 9 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 14 | 0 |
| 2001 | 15 | 1 |
| 2002 | 9 | 12 |
| 2003 | 14 | 7 |
| 2004 | 7 | 10 |
| 2005 | 8 | 15 |
| 2006 | 9 | 11 |
| 2007 | 2 | 10 |
| 2008 | 4 | 11 |
| 2009 | 2 | 9 |
| 2010 | 5 | 9 |
| 2011 | 2 | 12 |
| 2012 | 6 | 18 |
| 2013 | 11 | 16 |
| 2014 | 7 | 15 |
| 2015 | 7 | 12 |
| 2016 | 15 | 19 |
| 2017 | 13 | 19 |
| 2018 | 17 | 22 |
| 2019 | 17 | 13 |
| 2020 | 13 | 12 |
| 2021 | 7 | 14 |
| 2022 | 14 | 15 |
| 2023 | 9 | 6 |
| 2024 | 15 | 6 |
| 2025 | 6 | 9 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Plumbing vent plug11 Aug 2026US 12,704,256 B2
- Push/pull furnace and methods related thereto14 Jul 2026US 12,680,693 B2Trane International Inc.
- 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
- High-efficiency heating apparatus17 Feb 2026US 12,551,057 B1Hyper Fryer, LLC
- Combustion device2 Jul 2026US 2026/0185706 A1Rinnai Corporation
- Telescopic Pulse Ash Blower Capable of Blowing Ash at Multiple Angles and Ash Blowing Method Thereof18 Jun 2026US 2026/0168668 A1Harbin Xiandai Intelligent Equipment Manufacturing Co., Ltd.
- Fluidic turbo heater system21 May 2026US 2026/0139639 A1Jetoptera, Inc.
- Exhaust port member23 Apr 2026US 2026/0110431 A1Rinnai Corporation
- Intake device for a chimney termination20 Nov 2025US 2025/0354688 A1Rlh Industries, Inc.
Most cited
By later US patents
- Variable-volume exhaust system169US 10,029,289 B2Greenheck Fan Corporation · 2018
- Air pollution control apparatus and air pollution control method127US 8,202,354 B2Mitsubishi Heavy Industries, Ltd. · 2012
- Auxiliary exhaust system94US 4,487,137 A1984
- Direct-vented gas fireplace70US 4,793,322 A1988
- Plume elimination mechanism63US 4,184,417 AFord Motor Company · 1980