F23N 5/08
Using light-sensitive elements
Official title: using light-sensitive elements
F23N5/08 (Using light-sensitive elements) appears on 512 US grants and 328 published applications in this corpus.
Search patents in F23N- Granted patents
- 512
- Published applications
- 328
- Assignees
- 298
- Inventors
- 1,094
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 12 | 0 |
| 1978 | 4 | 0 |
| 1979 | 9 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 4 | 0 |
| 1983 | 10 | 0 |
| 1984 | 4 | 0 |
| 1985 | 9 | 0 |
| 1986 | 8 | 0 |
| 1987 | 8 | 0 |
| 1988 | 8 | 0 |
| 1989 | 13 | 0 |
| 1990 | 10 | 0 |
| 1991 | 11 | 0 |
| 1992 | 10 | 0 |
| 1993 | 16 | 0 |
| 1994 | 12 | 0 |
| 1995 | 7 | 0 |
| 1996 | 14 | 0 |
| 1997 | 9 | 0 |
| 1998 | 14 | 0 |
| 1999 | 17 | 0 |
| 2000 | 17 | 0 |
| 2001 | 13 | 4 |
| 2002 | 12 | 10 |
| 2003 | 7 | 9 |
| 2004 | 7 | 13 |
| 2005 | 3 | 14 |
| 2006 | 8 | 14 |
| 2007 | 9 | 11 |
| 2008 | 5 | 11 |
| 2009 | 8 | 17 |
| 2010 | 9 | 23 |
| 2011 | 10 | 16 |
| 2012 | 16 | 16 |
| 2013 | 19 | 13 |
| 2014 | 15 | 15 |
| 2015 | 7 | 11 |
| 2016 | 11 | 18 |
| 2017 | 12 | 14 |
| 2018 | 15 | 12 |
| 2019 | 15 | 15 |
| 2020 | 9 | 17 |
| 2021 | 7 | 9 |
| 2022 | 8 | 10 |
| 2023 | 11 | 11 |
| 2024 | 6 | 9 |
| 2025 | 10 | 11 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Control unit for detecting a flame in operation using flame monitors suitable for burners and flame monitoring system1 Sep 2026US 12,723,756 B2BFI Automation Mindermann GmbH
- Monitoring combustible matter in a gaseous stream2 Jun 2026US 12,644,599 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
- Inspection device12 May 2026US 12,624,835 B2Azbil Corporation
- Detection apparatus and combustion system5 May 2026US 12,618,560 B2Yokogawa Electric Corporation
- Enhanced sensors for heating operations16 Jul 2026US 2026/0202332 A1
- Fuel identification and flame behavior monitoring system28 May 2026US 2026/0146737 A1Carrier Corporation
- Optical diagnosis system and method for ignition of single-particle excavate waste21 May 2026US 2026/0139832 A1Tianjin University
- Flame Atomic Absorption Photometer26 Mar 2026US 2026/0086025 A1Shimadzu Corporation
- Turbine engine having an optical sensor12 Mar 2026US 2026/0071754 A1General Electric Company
Most cited
By later US patents
- Fiber optic linked flame sensor206US 5,828,797 AMeggitt Avionics, Inc. · 1998
- Variable heat generating method and apparatus129US 4,622,007 AAmerican Combustion, Inc. · 1986
- Flame detector123US 4,157,506 ACombustion Engineering, Inc. · 1979
- Fail safe gas furnace optical flame sensor using a transconductance amplifier and low photodiode current114US 6,060,719 AGas Research Institute · 2000
- Real-time combustion controls and diagnostics sensors (CCADS)106US 6,887,069 B1The United States of America as represented by the United States Department of Energy · 2005