F02C 9/36
Characterised by returning of fuel to sump
Official title: characterised by returning of fuel to sump (F02C9/38 takes precedence)
F02C9/36 (Characterised by returning of fuel to sump) appears on 54 US grants and 57 published applications in this corpus.
Search patents in F02C- Granted patents
- 54
- Published applications
- 57
- Assignees
- 27
- Inventors
- 135
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 1 |
| 2003 | 2 | 2 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 2 | 3 |
| 2011 | 0 | 1 |
| 2012 | 3 | 2 |
| 2013 | 1 | 3 |
| 2014 | 3 | 4 |
| 2015 | 1 | 1 |
| 2016 | 3 | 1 |
| 2017 | 1 | 7 |
| 2018 | 4 | 1 |
| 2019 | 4 | 3 |
| 2020 | 1 | 2 |
| 2021 | 2 | 2 |
| 2022 | 6 | 3 |
| 2023 | 2 | 6 |
| 2024 | 6 | 6 |
| 2025 | 2 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for detecting malfunctioning of a fuel return valve in an aircraft25 Aug 2026US 12,716,811 B2Airbus Operations GmbH
- Gas turbine fuel return line15 Jul 2025US 12,359,618 B2ROLLS-ROYCE plc
- Dedicated thermal recirculation control4 Mar 2025US 12,241,418 B2Hamilton Sundstrand Corporation
- Gas turbine engine heat exchange3 Dec 2024US 12,158,115 B2ROLLS-ROYCE plc
- Fluid delivery system12 Nov 2024US 12,140,079 B2Hamilton Sundstrand Corporation
- Gas turbine fuel return line19 Jun 2025US 2025/0198335 A1ROLLS-ROYCE plc
- Lightoff fuel pressure reduction system3 Apr 2025US 2025/0109710 A1Solar Turbines Incorporated
- Dedicated thermal recirculation control23 Jan 2025US 2025/0027451 A1Hamilton Sundstrand Corporation
- Fuel systems having thermal recirculation28 Nov 2024US 2024/0392725 A1Hamilton Sundstrand Corporation
- Method of operating a gas turbine engine at a low power condition10 Oct 2024US 2024/0337222 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Multiple gas turbine forwarding system130US 8,951,019 B2General Electric Company · 2015
- Method and system for detecting ignition failure in a gas turbine engine40US 7,386,982 B2General Electric Company · 2008
- Turbine engine control system providing electronic power turbine governor and temperature/torque limiting31US 6,282,882 B1AlliedSignal Inc. · 2001
- Turbine engine fuel control system29US 6,357,219 B1AlliedSignal Inc. · 2002
- Fuel supply system24US 7,234,293 B2Goodrich Control Systems Limited · 2007