F23N 2225/04
Pressure
Official title: pressure
F23N2225/04 (Pressure) appears on 387 US grants and 311 published applications in this corpus.
Search patents in F23N- Granted patents
- 387
- Published applications
- 311
- Assignees
- 235
- Inventors
- 927
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 14 | 0 |
| 1990 | 10 | 0 |
| 1991 | 10 | 0 |
| 1992 | 10 | 0 |
| 1993 | 11 | 0 |
| 1994 | 10 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 12 | 0 |
| 1998 | 11 | 0 |
| 1999 | 11 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 4 |
| 2002 | 6 | 4 |
| 2003 | 9 | 6 |
| 2004 | 8 | 8 |
| 2005 | 2 | 7 |
| 2006 | 5 | 15 |
| 2007 | 9 | 13 |
| 2008 | 2 | 10 |
| 2009 | 3 | 11 |
| 2010 | 8 | 10 |
| 2011 | 9 | 13 |
| 2012 | 1 | 10 |
| 2013 | 10 | 16 |
| 2014 | 11 | 13 |
| 2015 | 14 | 16 |
| 2016 | 11 | 14 |
| 2017 | 13 | 10 |
| 2018 | 10 | 13 |
| 2019 | 11 | 14 |
| 2020 | 11 | 17 |
| 2021 | 12 | 14 |
| 2022 | 17 | 21 |
| 2023 | 14 | 12 |
| 2024 | 12 | 20 |
| 2025 | 12 | 12 |
| 2026 | 8 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for automated furnace inducer sensor output verification22 Sep 2026US 12,742,548 B2Rheem Manufacturing Company
- Method and controller for operating a gas burner appliance19 May 2026US 12,631,331 B2Pittway Sarl
- Device and method for controlling a fuel-oxidizer mixture for a premix gas burner14 Apr 2026US 12,601,477 B2Bertelli & Partners S.R.L.
- Combustion apparatus with mass flow sensor7 Apr 2026US 12,595,773 B2Siemens Aktiengesellschaft
- Systems and processes of eliminating start-up flaring in a gas plant17 Mar 2026US 12,578,740 B2Saudi Arabian Oil Company
- Premixing device and combustion device comprising same8 Oct 2026US 2026/0309326 A1Noritz Corporation
- Flue gas circulation system for improving combustion characteristics and thermal characteristics of pulverized coal fired boiler3 Sep 2026US 2026/0258941 A1Xi'an Thermal Power Research Institute Co., Ltd.
- Device for delivering a gaseous mixture, corresponding delivery apparatus and corresponding method of use3 Sep 2026US 2026/0258947 A1Sit S.P.A.
- Device for producing a hydrogen - gaseous hydrocarbon mixture3 Sep 2026US 2026/0258948 A1Suntec Industries France
- Plant and method for operating plant27 Aug 2026US 2026/0251301 A1Mitsubishi Heavy Industries, Ltd.
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
- Non-recovery coke oven gas combustion system135US 5,968,320 AStelco Inc. · 1999
- Variable heat generating method and apparatus129US 4,622,007 AAmerican Combustion, Inc. · 1986
- Integrated furnace control having ignition and pressure switch diagnostics129US 4,842,510 AHamilton Standard Controls, Inc. · 1989