F23N 2237/16
Secondary air
Official title: secondary air
F23N2237/16 (Secondary air) appears on 58 US grants and 30 published applications in this corpus.
Search patents in F23N- Granted patents
- 58
- Published applications
- 30
- Assignees
- 59
- Inventors
- 153
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 10 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 0 | 1 |
| 2003 | 3 | 2 |
| 2004 | 4 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 3 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 3 |
| 2019 | 1 | 3 |
| 2020 | 3 | 3 |
| 2021 | 1 | 2 |
| 2022 | 1 | 0 |
| 2023 | 2 | 0 |
| 2024 | 2 | 1 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Atomization burner with flexible fire rate14 Apr 2026US 12,601,481 B2Babington Technology, Inc.
- Atomization burner with flexible fire rate9 Jul 2024US 12,031,721 B2Babington Technology, Inc.
- Flame module for a spectrometer9 Apr 2024US 11,953,203 B2Thermo Fisher Scientific (Bremen) GmbH
- Controlled secondary air supply range burner27 Jun 2023US 11,686,472 B2Gas Technology Institute
- Method and device for automatically adapting a flame to variable operating conditions7 Mar 2023US 11,598,521 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Fuel injection assembly having partial direct injectors19 Jun 2025US 2025/0198620 A1GE Infrastructure Technology LLC
- Atomization burner with flexible fire rate6 Feb 2025US 2025/0043954 A1Babington Technology, Inc.
- Burner Device with Primary Air Chamber, Staged Air Chamber, and Tertiary Air Chamber17 Oct 2024US 2024/0344693 A1
- Controlled secondary air supply range burner2 Dec 2021US 2021/0372612 A1Gas Technology Institute
- Flame module for a spectrometer8 Jul 2021US 2021/0207802 A1Thermo Fisher Scientific (Bremen) GmbH
Most cited
By later US patents
- Airflow modulation technique for low emissions combustors96US 6,826,913 B2Honeywell International Inc. · 2004
- Combustion control method47US 4,622,922 AHitachi, Ltd. · 1986
- High velocity burner, system and method42US 5,263,849 AHauck Manufacturing Company · 1993
- Dual firing rate flame sensing system39US 4,457,692 AHoneywell Inc. · 1984
- Variable orifice gas modulating valve39US 5,234,196 AHarmony Thermal Company, Inc. · 1993