Fuel Spray Nozzle
US-2023358405-A1 · Nov 9, 2023 · US
Purging
Purging · 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 | F23D2209/30 |
| Official title | Purging |
| Display label | Purging |
| Total patents | 76 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 10 |
| 2017 | 7 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 8 |
| 2021 | 1 |
| 2022 | 8 |
| 2023 | 9 |
| 2024 | 6 |
| 2025 | 5 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fuel systems and methods for purging
US-11808219-B2 · Nov 7, 2023 · US
System and method for fuel nozzle cleaning during engine operation
US-11761386-B2 · Sep 19, 2023 · US
Tapered plug burner cleaning ports
US-11747015-B2 · Sep 5, 2023 · US
Tapered plug burner cleaning ports
US-2023096250-A1 · Mar 30, 2023 · US
Manifold purge for gaseous fuel system of engine
US-2023018918-A1 · Jan 19, 2023 · US
Tapered plug burner cleaning ports
US-11549683-B2 · Jan 10, 2023 · US
Fuel systems and methods for purging
US-2022325668-A1 · Oct 13, 2022 · US
System and method for purging a fuel manifold of a gas turbine engine using a flow divider assembly
US-2022298972-A1 · Sep 22, 2022 · US
System and method for fuel nozzle cleaning during engine operation
US-2022290620-A1 · Sep 15, 2022 · US
System and method for purging a fuel manifold of a gas turbine engine using a flow divider assembly
US-11391214-B2 · Jul 19, 2022 · US
Fuel nozzle structure for air assist injection
US-2022186930-A1 · Jun 16, 2022 · US
System and method for fuel nozzle cleaning during engine operation
US-11359554-B2 · Jun 14, 2022 · US
Flashback resistant premixed fuel injector for a gas turbine engine
US-2022128237-A1 · Apr 28, 2022 · US
Fuel nozzle structure for air assist injection
US-11300295-B2 · Apr 12, 2022 · US
System and method for fuel nozzle cleaning during engine operation
US-2021277838-A1 · Sep 9, 2021 · US
System and method for purging a fuel manifold of a gas turbine engine using a flow divider assembly
US-2020362764-A1 · Nov 19, 2020 · US
System and method for purging a fuel manifold of a gas turbine engine using an accumulator
US-2020362760-A1 · Nov 19, 2020 · US
Gas turbine combustor and method of operating the same
US-10794296-B2 · Oct 6, 2020 · US
Dual-fuel fuel nozzle with gas and liquid fuel capability
US-10663171-B2 · May 26, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F23D2209/30?
- CPC F23D2209/30 is the Cooperative Patent Classification code for “Purging.”
- How many patents are filed under CPC F23D2209/30 (Purging)?
- Our database includes 76 publications tagged with this CPC code.
- Is patent activity under CPC F23D2209/30 growing?
- Publication counts under this code: 6 in 2024 vs 5 in 2025 (latest complete years).