Turbine nozzle segment and a turbinne nozzle comprising such a turbine nozzle segment
US-2021246810-A1 · Aug 12, 2021 · US
for a special turbine stage
for a special turbine stage · 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 | F05D2220/321 |
| Official title | for a special turbine stage |
| Display label | for a special turbine stage |
| Total patents | 81 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 4 |
| 2017 | 8 |
| 2018 | 5 |
| 2019 | 10 |
| 2020 | 27 |
| 2021 | 8 |
| 2022 | 5 |
| 2023 | 7 |
| 2024 | 4 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Engine inspection and maintenance tool
US-2021239010-A1 · Aug 5, 2021 · US
Reduced leakage air seal
US-11028715-B2 · Jun 8, 2021 · US
Blade outer air seal with separate forward and aft pressure chambers
US-10907492-B2 · Feb 2, 2021 · US
Turbine blade and gas turbine
US-2021025279-A1 · Jan 28, 2021 · US
System for braking a low pressure spool in a gas turbine engine
US-10837312-B2 · Nov 17, 2020 · US
Frangible gas turbine engine airfoil with chord reduction
US-10837286-B2 · Nov 17, 2020 · US
Gas turbine engine airfoil frequency design
US-10801330-B1 · Oct 13, 2020 · US
Pressure relief door rotating exhaust deflector
US-2020291813-A1 · Sep 17, 2020 · US
Separable turbine vane stage
US-10774662-B2 · Sep 15, 2020 · US
Pressure relief door rotating exhaust deflector
US-10774681-B1 · Sep 15, 2020 · US
Gas turbine engine airfoil frequency design
US-10767488-B1 · Sep 8, 2020 · US
Hybrid gas turbine engine control system
US-2020271061-A1 · Aug 27, 2020 · US
Turbomachine with Alternatingly Spaced Rotor Blades
US-2020263547-A1 · Aug 20, 2020 · US
Airfoil for a turbo machine
US-10746034-B2 · Aug 18, 2020 · US
Gas turbine rotor, gas turbine, and gas turbine equipment
US-10738618-B2 · Aug 11, 2020 · US
Machine learned aero-thermodynamic engine inlet condition synthesis
US-2020248622-A1 · Aug 6, 2020 · US
Turbine ring sector having an environmental barrier doped with an electrically-conductive element
US-10724399-B2 · Jul 28, 2020 · US
Interdigitated turbine engine air bearing and method of operation
US-10718265-B2 · Jul 21, 2020 · US
Gas turbine engine airfoil frequency design
US-10697304-B1 · Jun 30, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F05D2220/321?
- CPC F05D2220/321 is the Cooperative Patent Classification code for “for a special turbine stage.”
- How many patents are filed under CPC F05D2220/321 (for a special turbine stage)?
- Our database includes 81 publications tagged with this CPC code.
- Is patent activity under CPC F05D2220/321 growing?
- Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).