F23N 3/00
Regulating air supply or draught
Official title: Regulating air supply or draught (conjointly with fuel supply F23N1/00)
F23N3/00 (Regulating air supply or draught) appears on 541 US grants and 497 published applications in this corpus.
Search patents in F23N- Granted patents
- 541
- Published applications
- 497
- Assignees
- 352
- Inventors
- 1,198
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 8 | 0 |
| 1978 | 5 | 0 |
| 1979 | 16 | 0 |
| 1980 | 14 | 0 |
| 1981 | 27 | 0 |
| 1982 | 14 | 0 |
| 1983 | 12 | 0 |
| 1984 | 17 | 0 |
| 1985 | 9 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 8 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 3 |
| 2002 | 2 | 3 |
| 2003 | 6 | 8 |
| 2004 | 6 | 15 |
| 2005 | 4 | 11 |
| 2006 | 7 | 13 |
| 2007 | 7 | 15 |
| 2008 | 3 | 14 |
| 2009 | 3 | 19 |
| 2010 | 14 | 20 |
| 2011 | 13 | 29 |
| 2012 | 11 | 26 |
| 2013 | 11 | 27 |
| 2014 | 17 | 33 |
| 2015 | 14 | 20 |
| 2016 | 23 | 29 |
| 2017 | 34 | 30 |
| 2018 | 17 | 19 |
| 2019 | 25 | 22 |
| 2020 | 25 | 23 |
| 2021 | 17 | 21 |
| 2022 | 18 | 27 |
| 2023 | 21 | 23 |
| 2024 | 12 | 20 |
| 2025 | 17 | 13 |
| 2026 | 15 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23N 3/08Regulating air supply or draught: by power-assisted systems226
- F23N 3/04Regulating air supply or draught: by operation of single valves or dampers112
- F23N 3/002Regulating air supply or draught: using electronic means98
- F23N 3/02Regulating draught by direct pressure operation of single valves or dampers33
- F23N 3/007Regulating air supply or draught: using mechanical means32
- F23N 3/005Regulating air supply or draught: using electrical or electromechanical means31
- F23N 3/06Regulating air supply or draught: by conjoint operation of two or more28
Recent patents
- Systems and methods for automated furnace inducer sensor output verification22 Sep 2026US 12,742,548 B2Rheem Manufacturing Company
- Method for regulating a pellet-fired burner and corresponding installation25 Aug 2026US 12,716,585 B2N2Air
- Systems and methods for operation of a flexible fuel combustor25 Aug 2026US 12,716,589 B28 Rivers Capital, LLC
- Method and apparatus for regulating a flame length in a partial oxidation reactor11 Aug 2026US 12,704,258 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Real-time flare optimization using an edge device12 May 2026US 12,624,834 B2Schlumberger Technology Corporation
- Device for delivering a gaseous mixture, corresponding delivery apparatus and corresponding method of use3 Sep 2026US 2026/0258947 A1Sit S.P.A.
- Pulse flow reactors and systems or uses thereof27 Aug 2026US 2026/0249124 A1ThermoChem Recovery International, Inc.
- Plant and method for operating plant27 Aug 2026US 2026/0251301 A1Mitsubishi Heavy Industries, Ltd.
- Manual air control device for gas burner6 Aug 2026US 2026/0227065 A1SNT Co., Ltd.
- Combustion system capable of operating with a recycling of combustion fumes30 Jul 2026US 2026/0218900 A1Carbodown
Most cited
By later US patents
- Electronically commutated motor1,555US 4,169,990 AGeneral Electric Company · 1979
- Electronically commutated motor systems and control therefor813US 4,459,519 AGeneral Electric Company · 1984
- Refrigeration system and control therefor123US 4,015,182 AGeneral Electric Company · 1977
- Method of and power plant for generating power by oxyfuel combustion104US 7,874,140 B2Foster Wheeler North America Corp. · 2011
- Variable speed inducer motor control method99US 5,791,332 ACarrier Corporation · 1998