F23L 13/00
Construction of valves or dampers for controlling air supply or draught
F23L13/00 (Construction of valves or dampers for controlling air supply or draught) appears on 227 US grants and 139 published applications in this corpus.
Search patents in F23L- Granted patents
- 227
- Published applications
- 139
- Assignees
- 134
- Inventors
- 381
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 9 | 0 |
| 1981 | 12 | 0 |
| 1982 | 5 | 0 |
| 1983 | 11 | 0 |
| 1984 | 12 | 0 |
| 1985 | 8 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 6 | 0 |
| 2002 | 2 | 0 |
| 2003 | 4 | 4 |
| 2004 | 3 | 3 |
| 2005 | 2 | 3 |
| 2006 | 1 | 5 |
| 2007 | 1 | 4 |
| 2008 | 2 | 4 |
| 2009 | 1 | 7 |
| 2010 | 1 | 5 |
| 2011 | 2 | 6 |
| 2012 | 4 | 10 |
| 2013 | 6 | 6 |
| 2014 | 3 | 10 |
| 2015 | 5 | 10 |
| 2016 | 8 | 4 |
| 2017 | 7 | 10 |
| 2018 | 6 | 10 |
| 2019 | 11 | 3 |
| 2020 | 7 | 10 |
| 2021 | 3 | 4 |
| 2022 | 8 | 7 |
| 2023 | 5 | 5 |
| 2024 | 6 | 4 |
| 2025 | 3 | 2 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Furnace30 Jun 2026US 12,669,266 B2Fire Chief Industries LLC
- Electronic control device and flow rate measurement system17 Mar 2026US 12,578,091 B2Hitachi Astemo, Ltd.
- Non-return valve for a flow channel through which a flow of air flows24 Feb 2026US 12,560,242 B2Skoberne GmbH
- Method and device for controlling the combustion in furnace systems17 Feb 2026US 12,553,607 B2Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- Variable orifice restriction device13 Jan 2026US 12,523,374 B2The Marley Company
- Manual air control device for gas burner6 Aug 2026US 2026/0227065 A1SNT Co., Ltd.
- Variable orifice restriction device30 Apr 2026US 2026/0117972 A1The Marley Company
- Flexible anti-backflow damper for a fireplace system19 Feb 2026US 2026/0049715 A1HNI Technologies Inc.
- Premixing apparatus12 Jun 2025US 2025/0189124 A1Rinnai Corporation
- Combustion device30 Jan 2025US 2025/0035303 A1Lepaier Global Co., Ltd.
Most cited
By later US patents
- Air pollution control apparatus and air pollution control method127US 8,202,354 B2Mitsubishi Heavy Industries, Ltd. · 2012
- Mechanical sealing means86US 4,093,245 AMosser Industries, Inc. · 1978
- Dampers with leaf spring seals37US 4,823,836 A1989
- Self-powered automatic secondary air controllers for woodstoves and small furnaces36US 5,014,680 AThe United States of America as represented by the United States Department of Energy · 1991
- Vent stack lids and associated systems and methods35US 11,142,699 B2Suncoke Technology and Development LLC · 2021