Small satellite propulsion system utilizing liquid propellant ullage vapor
US-12442350-B2 · Oct 14, 2025 · US
Propellants
Propellants · 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 | F02K9/425 |
| Official title | {Propellants} |
| Display label | Propellants |
| Total patents | 56 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2016 | 9 |
| 2017 | 7 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 6 |
| 2021 | 5 |
| 2022 | 4 |
| 2023 | 5 |
| 2024 | 4 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Warm gas thruster system with control valve that has a soft seal
US-2025237183-A1 · Jul 24, 2025 · US
Nuclear thermal propulsion system with reactor direct drive of cryocooler turbine
US-12351344-B2 · Jul 8, 2025 · US
Nuclear thermal propulsion system with reactor direct drive of cryocooler turbine
US-2025066045-A1 · Feb 27, 2025 · US
Nuclear thermal propulsion system with reactor direct drive of cryocooler turbine
US-12234042-B2 · Feb 25, 2025 · US
Nuclear thermal propulsion system with reactor direct drive of cryocooler turbine
US-2024278938-A1 · Aug 22, 2024 · US
Coil-on plug exciter
US-11988149-B1 · May 21, 2024 · US
Nuclear thermal propulsion system with reactor direct drive of cryocooler turbine
US-11975870-B2 · May 7, 2024 · US
Propulsion method based on liquid carbon dioxide phase change and propulsion device thereof
US-11858666-B2 · Jan 2, 2024 · US
Nuclear thermal propulsion system with reactor direct drive of cryocooler turbine
US-2023415926-A1 · Dec 28, 2023 · US
Method of manufacturing orifice
US-11815056-B2 · Nov 14, 2023 · US
Refrigeration method using an artificial neural network
US-2023341088-A1 · Oct 26, 2023 · US
Carbide-based fuel assembly for thermal propulsion applications
US-2023326618-A1 · Oct 12, 2023 · US
Carbide-based fuel assembly for thermal propulsion applications
US-11728044-B2 · Aug 15, 2023 · US
Vortex thruster system including catalyst bed with screen assembly
US-2022120240-A1 · Apr 21, 2022 · US
Carbide-based fuel assembly for thermal propulsion applications
US-2022115149-A1 · Apr 14, 2022 · US
Refrigeration cycle for liquid oxygen densification
US-11293671-B2 · Apr 5, 2022 · US
Propulsion Method Based on Liquid Carbon Dioxide Phase Change and Propulsion Device Thereof
US-2022056896-A1 · Feb 24, 2022 · US
Rocket propulsion system and method for operating a rocket propulsion system
US-11143144-B2 · Oct 12, 2021 · US
Method for operating a rocket propulsion system and rocket propulsion system
US-11053892-B2 · Jul 6, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02K9/425?
- CPC F02K9/425 is the Cooperative Patent Classification code for “Propellants.”
- How many patents are filed under CPC F02K9/425 (Propellants)?
- Our database includes 56 publications tagged with this CPC code.
- Is patent activity under CPC F02K9/425 growing?
- Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).