F05D 2270/31
Fuel schedule for stage combustors
F05D2270/31 (Fuel schedule for stage combustors) appears on 118 US grants and 108 published applications in this corpus.
Search patents in F05D- Granted patents
- 118
- Published applications
- 108
- Assignees
- 40
- Inventors
- 287
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 2 |
| 2006 | 0 | 2 |
| 2007 | 2 | 1 |
| 2008 | 2 | 2 |
| 2009 | 1 | 5 |
| 2010 | 0 | 4 |
| 2011 | 5 | 3 |
| 2012 | 4 | 6 |
| 2013 | 3 | 3 |
| 2014 | 3 | 4 |
| 2015 | 4 | 3 |
| 2016 | 5 | 12 |
| 2017 | 4 | 3 |
| 2018 | 6 | 7 |
| 2019 | 10 | 4 |
| 2020 | 3 | 4 |
| 2021 | 10 | 6 |
| 2022 | 3 | 3 |
| 2023 | 6 | 10 |
| 2024 | 10 | 11 |
| 2025 | 8 | 7 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Loading parameters23 Jun 2026US 12,662,970 B2ROLLS-ROYCE plc
- Combustion apparatus for a gas turbine engine9 Jun 2026US 12,650,228 B2ROLLS-ROYCE plc
- Gas turbine operation24 Mar 2026US 12,584,448 B2ROLLS-ROYCE plc
- Combustion system and method for attenuation of combustion dynamics in a gas turbine engine10 Mar 2026US 12,571,540 B2General Electric Company
- Predicting fuel burn and emissions for aircraft10 Feb 2026US 12,546,262 B2The Boeing Company
- Fuel scheduling1 Oct 2026US 2026/0298156 A1ROLLS-ROYCE plc
- Fuel systems1 Oct 2026US 2026/0298157 A1ROLLS-ROYCE plc
- Fuel allocation1 Oct 2026US 2026/0298158 A1ROLLS-ROYCE plc
- Monitoring and scheduling fuel use for multi-fuel aircraft powerplants21 May 2026US 2026/0139632 A1Pratt & Whitney Canada Corp.
- Switchable aero engine dual fuel control system with dhfc21 May 2026US 2026/0139633 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Dual stage-dual mode low nox combustor113US 4,292,801 AGeneral Electric Company · 1981
- Methods and systems for supplying fuel to gas turbine engines84US 11,015,536 B2BJ Energy Solutions, LLC · 2021
- Gas turbine apparatus79US 4,735,052 AKabushiki Kaisha Toshiba · 1988
- Gas turbine combustor and methodd of operating the same79US 5,121,597 AHitachi, Ltd. · 1992
- Dual stage-dual mode low emission gas turbine combustion system76US 4,420,929 AGeneral Electric Company · 1983