F23N 2235/12
Fuel valves
F23N2235/12 (Fuel valves) appears on 1,083 US grants and 754 published applications in this corpus.
Search patents in F23N- Granted patents
- 1,083
- Published applications
- 754
- Assignees
- 452
- Inventors
- 1,748
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 10 | 0 |
| 1978 | 15 | 0 |
| 1979 | 5 | 0 |
| 1980 | 7 | 0 |
| 1981 | 13 | 0 |
| 1982 | 10 | 0 |
| 1983 | 14 | 0 |
| 1984 | 29 | 0 |
| 1985 | 19 | 0 |
| 1986 | 17 | 0 |
| 1987 | 14 | 0 |
| 1988 | 28 | 0 |
| 1989 | 21 | 0 |
| 1990 | 31 | 0 |
| 1991 | 23 | 0 |
| 1992 | 27 | 0 |
| 1993 | 20 | 0 |
| 1994 | 24 | 0 |
| 1995 | 24 | 0 |
| 1996 | 18 | 0 |
| 1997 | 16 | 0 |
| 1998 | 28 | 0 |
| 1999 | 42 | 0 |
| 2000 | 19 | 0 |
| 2001 | 26 | 8 |
| 2002 | 19 | 16 |
| 2003 | 22 | 17 |
| 2004 | 15 | 27 |
| 2005 | 18 | 25 |
| 2006 | 18 | 23 |
| 2007 | 12 | 23 |
| 2008 | 7 | 21 |
| 2009 | 11 | 25 |
| 2010 | 12 | 37 |
| 2011 | 13 | 30 |
| 2012 | 23 | 36 |
| 2013 | 21 | 35 |
| 2014 | 31 | 32 |
| 2015 | 32 | 37 |
| 2016 | 27 | 35 |
| 2017 | 38 | 34 |
| 2018 | 27 | 20 |
| 2019 | 29 | 38 |
| 2020 | 29 | 30 |
| 2021 | 28 | 38 |
| 2022 | 32 | 51 |
| 2023 | 33 | 37 |
| 2024 | 33 | 33 |
| 2025 | 24 | 24 |
| 2026 | 18 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23N 2235/14Electromagnetically operatedIndexing code435
- F23N 2235/24Valve detailsIndexing code374
- F23N 2235/16Variable flow or proportional valvesIndexing code310
- F23N 2235/18Groups of two or more valvesIndexing code297
- F23N 2235/20Membrane valvesIndexing code162
- F23N 2235/22Cooperating with magnetsIndexing code41
Recent patents
- Systems and methods for controlling a variable gas valve15 Sep 2026US 12,736,230 B2Copeland Comfort Control LP
- Bi-stable valve25 Aug 2026US 12,716,507 B2Honeywell International Inc.
- Flow modulator for a fluid11 Aug 2026US 12,704,187 B2Pittway Sarl
- Push/pull furnace and methods related thereto14 Jul 2026US 12,680,693 B2Trane International Inc.
- Quick heat algorithm for modulating heating equipment14 Jul 2026US 12,680,719 B2Johnson Controls Light Commercial IP GmbH
- Device and method for controlling a comburent-fuel mixture in a premixed gas burner17 Sep 2026US 2026/0276195 A1Bertelli & Partners S.R.L.
- Device for producing a hydrogen - gaseous hydrocarbon mixture3 Sep 2026US 2026/0258948 A1Suntec Industries France
- Method of heating a steel semi-product in a heating furnace, and associated heating furnace3 Sep 2026US 2026/0259005 A1
- Plant and method for operating plant27 Aug 2026US 2026/0251301 A1Mitsubishi Heavy Industries, Ltd.
- Carbon monoxide detector and safety switch30 Jul 2026US 2026/0218901 A1ZeroCo Systems, LLC
Most cited
By later US patents
- Integrated appliance control system186US 6,059,195 ATridelta Industries, Inc. · 2000
- Modulating furnace with two-speed draft inducer138US 5,732,691 ARheem Manufacturing Company · 1998
- Burner ignition system132US 4,717,333 AAdvanced Mechanical Technology, Inc. · 1988
- Variable heat generating method and apparatus129US 4,622,007 AAmerican Combustion, Inc. · 1986
- Ignition boost and rectification flame detection circuit115US 6,222,719 B12001