F23N 2221/06
Preheating gaseous fuel
F23N2221/06 (Preheating gaseous fuel) appears on 15 US grants and 17 published applications in this corpus.
Search patents in F23N- Granted patents
- 15
- Published applications
- 17
- Assignees
- 10
- Inventors
- 48
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 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 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 2 |
| 2019 | 1 | 0 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 2 |
| 2023 | 1 | 2 |
| 2024 | 1 | 0 |
| 2025 | 1 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods and systems for mixing fluids22 Sep 2026US 12,742,545 B2Ekona Power Inc.
- Systems and methods for operation of a flexible fuel combustor25 Aug 2026US 12,716,589 B28 Rivers Capital, LLC
- Systems and methods for operation of a flexible fuel combustor25 Mar 2025US 12,259,136 B28 Rivers Capital, LLC
- Oxygen injection for reformer feed gas for direct reduction process5 Mar 2024US 11,920,204 B2Midrex Technologies, Inc.
- Systems and methods for operation of a flexible fuel combustor28 Nov 2023US 11,828,468 B28 Rivers Capital, LLC
- Heating device, heating apparatus and apparatus for providing a flow of gaseous hydrogen18 Sep 2025US 2025/0290665 A1ROLLS-ROYCE plc
- Systems and methods for operation of a flexible fuel combustor12 Jun 2025US 2025/0189135 A18 Rivers Capital, LLC
- Systems and methods for operation of a flexible fuel combustor30 Nov 2023US 2023/0383950 A18 Rivers Capital, LLC
- Methods and systems for mixing fluids15 Jun 2023US 2023/0184428 A1Ekona Power Inc.
- Oxygen Injection For Reformer Feed Gas For Direct Reduction Process7 Apr 2022US 2022/0106651 A1Midrex Technologies, Inc.
Most cited
By later US patents
- Recirculating furnace-dryer combination25US 4,017,254 A1977
- Regulation of gas combustion through flame position14US 6,113,384 A2000
- Method and apparatus for controlling the combustion in a gas turbine14US 7,730,726 B2Nuovo Pignone S.p.A. · 2010
- Method for producing ethanol and co-products from cellulosic biomass8US 8,545,633 B2Abengoa Bioenergy New Technologies, Inc. · 2013
- Fuel gas preheat for excess oxygen maintenance4US 4,174,943 AJohn Zink Company · 1979