Gas turbine engine with controlled return of fuel to power accessories and retrofitting method
US-2026036092-A1 · Feb 5, 2026 · US
characterised by throttling and returning of fuel to sump
characterised by throttling and returning of fuel to sump · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F02C9/38 |
| Official title | characterised by throttling and returning of fuel to sump |
| Display label | characterised by throttling and returning of fuel to sump |
| Total patents | 47 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 5 |
| 2020 | 2 |
| 2021 | 6 |
| 2022 | 9 |
| 2023 | 4 |
| 2024 | 8 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Start pump and generator
US-12473865-B1 · Nov 18, 2025 · US
Gas turbine engine with controlled return of fuel to power accessories and retrofitting method
US-12372032-B1 · Jul 29, 2025 · US
Excess fuel flow to drive turbine
US-12359625-B2 · Jul 15, 2025 · US
Gas turbine engine heat exchange
US-12158115-B2 · Dec 3, 2024 · US
Gas turbine engine heat exchange
US-2024309817-A1 · Sep 19, 2024 · US
Variable displacement pumps
US-12071942-B2 · Aug 27, 2024 · US
Gas turbine engine heat exchange
US-2024209799-A1 · Jun 27, 2024 · US
Systems and methods for purging a fuel manifold of a gas turbine engine
US-12018616-B2 · Jun 25, 2024 · US
Systems and methods for purging a fuel manifold of a gas turbine engine
US-2024151183-A1 · May 9, 2024 · US
Method for determining the density of fuel for metering fuel in a fuel supply circuit of an aircraft engine
US-11927141-B2 · Mar 12, 2024 · US
Flow recirculative power system
US-11859552-B2 · Jan 2, 2024 · US
Dual valve fluid metering system
US-11713718-B2 · Aug 1, 2023 · US
Variable displacement pump with active bypass feedback control
US-11674455-B2 · Jun 13, 2023 · US
Variable Displacement Pumps
US-2023125840-A1 · Apr 27, 2023 · US
Dual valve fluid metering system
US-2023101637-A1 · Mar 30, 2023 · US
Engine core speed reducing method and system
US-11530653-B2 · Dec 20, 2022 · US
Systems and methods for purging a fuel manifold of a gas turbine engine
US-11525410-B2 · Dec 13, 2022 · US
Flow recirculative power system
US-2022349317-A1 · Nov 3, 2022 · US
Variable displacement pump with active bypass feedback control
US-2022307491-A1 · Sep 29, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02C9/38?
- CPC F02C9/38 is the Cooperative Patent Classification code for “characterised by throttling and returning of fuel to sump.”
- How many patents are filed under CPC F02C9/38 (characterised by throttling and returning of fuel to sump)?
- Our database includes 47 publications tagged with this CPC code.
- Is patent activity under CPC F02C9/38 growing?
- Publication counts under this code: 8 in 2024 vs 3 in 2025 (latest complete years).