F23N 2229/04
Sensitive to the colour of flames
Official title: sensitive to the colour of flames
F23N2229/04 (Sensitive to the colour of flames) appears on 45 US grants and 54 published applications in this corpus.
Search patents in F23N- Granted patents
- 45
- Published applications
- 54
- Assignees
- 40
- Inventors
- 116
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 3 |
| 2006 | 0 | 3 |
| 2007 | 0 | 2 |
| 2008 | 5 | 3 |
| 2009 | 1 | 4 |
| 2010 | 3 | 6 |
| 2011 | 3 | 0 |
| 2012 | 5 | 2 |
| 2013 | 1 | 1 |
| 2014 | 4 | 1 |
| 2015 | 2 | 3 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 3 | 2 |
| 2019 | 1 | 5 |
| 2020 | 3 | 2 |
| 2021 | 2 | 3 |
| 2022 | 1 | 0 |
| 2023 | 2 | 4 |
| 2024 | 3 | 3 |
| 2025 | 2 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Real-time flare optimization using an edge device12 May 2026US 12,624,834 B2Schlumberger Technology Corporation
- Inspection device12 May 2026US 12,624,835 B2Azbil Corporation
- Burner control system21 Oct 2025US 12,449,127 B2Autoflame Engineering Limited
- Optical detection system for a gas turbine engine combustion assembly17 Jun 2025US 12,331,929 B2Rtx Corporation
- Combustion quality spectrum24 Dec 2024US 12,173,899 B2Baker Hughes Holdings LLC
- Fuel identification and flame behavior monitoring system28 May 2026US 2026/0146737 A1Carrier Corporation
- Method and device for estimating a combustion efficiency value during flaring21 Aug 2025US 2025/0264217 A1
- Burner Control System of or for a Heating System and Method for Controlling a Burner Control System8 May 2025US 2025/0146665 A1Intergas Verwarming B.V.
- Single-pixel multispectral imager for flare and burner combustion efficiency measurement6 Feb 2025US 2025/0044219 A1Schlumberger Technology Corporation
- Optical detection system for a gas turbine engine combustion assembly15 Aug 2024US 2024/0271784 A1Raytheon Technologies Corporation
Most cited
By later US patents
- Apparatus for observing combustion conditions in a gas turbine engine64US 7,484,369 B2Rosemount Aerospace Inc. · 2009
- Active combustion control system for gas turbine engines34US 7,775,052 B2Delavan Inc. · 2010
- Apparatus, system and method for observing combustion conditions in a gas turbine engine32US 7,334,413 B2Rosemount Aerospace Inc. · 2008
- System and method for flame stabilization and control23US 7,435,080 B2Combustion Science & Engineering, Inc. · 2008
- Flame scanning system22US 4,823,114 ACoen Company, Inc. · 1989