F23N 5/20
Systems for controlling combustion: with a time program acting through electrical means
Official title: with a time program acting through electrical means, e.g. using time-delay relays
F23N5/20 (Systems for controlling combustion: with a time program acting through electrical means) appears on 540 US grants and 252 published applications in this corpus.
Search patents in F23N- Granted patents
- 540
- Published applications
- 252
- Assignees
- 242
- Inventors
- 859
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 12 | 0 |
| 1978 | 18 | 0 |
| 1979 | 14 | 0 |
| 1980 | 15 | 0 |
| 1981 | 18 | 0 |
| 1982 | 16 | 0 |
| 1983 | 15 | 0 |
| 1984 | 15 | 0 |
| 1985 | 7 | 0 |
| 1986 | 11 | 0 |
| 1987 | 8 | 0 |
| 1988 | 11 | 0 |
| 1989 | 22 | 0 |
| 1990 | 15 | 0 |
| 1991 | 20 | 0 |
| 1992 | 18 | 0 |
| 1993 | 16 | 0 |
| 1994 | 19 | 0 |
| 1995 | 14 | 0 |
| 1996 | 9 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 18 | 0 |
| 2000 | 13 | 0 |
| 2001 | 9 | 2 |
| 2002 | 10 | 8 |
| 2003 | 12 | 11 |
| 2004 | 6 | 10 |
| 2005 | 7 | 18 |
| 2006 | 6 | 10 |
| 2007 | 7 | 19 |
| 2008 | 5 | 13 |
| 2009 | 5 | 11 |
| 2010 | 4 | 7 |
| 2011 | 9 | 10 |
| 2012 | 6 | 10 |
| 2013 | 3 | 2 |
| 2014 | 6 | 13 |
| 2015 | 5 | 9 |
| 2016 | 7 | 12 |
| 2017 | 10 | 6 |
| 2018 | 5 | 9 |
| 2019 | 15 | 16 |
| 2020 | 10 | 10 |
| 2021 | 14 | 11 |
| 2022 | 8 | 9 |
| 2023 | 9 | 13 |
| 2024 | 6 | 7 |
| 2025 | 5 | 5 |
| 2026 | 4 | 1 |
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
- Ignition-based protocols for pellet grills19 May 2026US 12,631,336 B2
- Systems and methods for operating a furnace14 Apr 2026US 12,601,482 B2Johnson Controls Light Commercial IP GmbH
- Control and/or regulation of a combustion apparatus6 Jan 2026US 12,516,812 B2Siemens Aktiengesellschaft
- Barbecue arrangement16 Dec 2025US 12,495,928 B2Gas Services Australia Pty Ltd
- Method of controlling deflagration combustion process in pistonless combustor30 Apr 2026US 2026/0117975 A1Finno Exergy Oy
- Continuously Modulating Actuator In A Combustion Apparatus20 Nov 2025US 2025/0354689 A1Siemens Aktiengesellschaft
- Method and device for estimating a combustion efficiency value during flaring21 Aug 2025US 2025/0264217 A1
- Adaptive Electronic Composite System17 Jul 2025US 2025/0230929 A1Siemens Aktiengesellschaft
- Method of controlling deflagration combustion process in pistonless combustor5 Jun 2025US 2025/0179959 A1Finno Exergy Oy
Most cited
By later US patents
- Programmer1,483US 4,213,562 A1980
- Graphical user interface system for a thermal comfort controller353US 6,595,430 B1Honeywell International Inc. · 2003
- Thermostat system communicating with a remote correspondent for receiving and displaying diverse information325US 6,619,555 B22003
- Electrically controlled programmable digital thermostat and method for regulating the operation of multistage heating and cooling systems272US 4,442,972 ATexas Instruments Incorporated · 1984
- Thermostat system with location data271US 6,789,739 B22004