Liquid rocket engine injector with variable flow area
US-2024318616-A1 · Sep 26, 2024 · US
using liquid or gaseous propellants (F02K9/72 takes precedence)
using liquid or gaseous propellants (F02K9/72 takes precedence) · 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 | F02K9/42 |
| Official title | using liquid or gaseous propellants (F02K9/72 takes precedence) |
| Display label | using liquid or gaseous propellants (F02K9/72 takes precedence) |
| Total patents | 78 |
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 | 3 |
| 2016 | 9 |
| 2017 | 5 |
| 2018 | 5 |
| 2019 | 4 |
| 2020 | 9 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 9 |
| 2024 | 12 |
| 2025 | 15 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Nuclear thermal propulsion system with reactor direct drive of cryocooler turbine
US-2024278938-A1 · Aug 22, 2024 · US
System and method for asynchronous autogenously pressurized in-space propulsion
US-12065270-B1 · Aug 20, 2024 · US
Rocket injector subscale stability assessment with telescoping piston
US-2024218845-A1 · Jul 4, 2024 · US
Rocket injector subscale stability assessment with telescoping throat or moveable injector plate
US-2024218846-A1 · Jul 4, 2024 · US
Active on orbit fluid propellant management and refueling systems and methods
US-12012233-B2 · Jun 18, 2024 · US
Nuclear thermal propulsion system with reactor direct drive of cryocooler turbine
US-11975870-B2 · May 7, 2024 · US
Liquid level equalization for propellant tanks
US-11939938-B2 · Mar 26, 2024 · US
Liquid hydrogen-liquid oxygen fueled powerplant
US-11905914-B2 · Feb 20, 2024 · US
Heating system for a spacecraft
US-11898519-B1 · Feb 13, 2024 · US
Nuclear thermal propulsion system with reactor direct drive of cryocooler turbine
US-2023415926-A1 · Dec 28, 2023 · US
Liquid level equalization for propellant tanks
US-2023392567-A1 · Dec 7, 2023 · US
Refrigeration method using an artificial neural network
US-2023341088-A1 · Oct 26, 2023 · US
Liquid rocket engine injector with variable flow area
US-2023304457-A1 · Sep 28, 2023 · US
Liquid hydrogen-liquid oxygen fueled powerplant
US-2023258148-A1 · Aug 17, 2023 · US
Reusable upper stage rocket with aerospike engine
US-2023211900-A1 · Jul 6, 2023 · US
Liquid rocket engine injector with variable flow area
US-11643995-B1 · May 9, 2023 · US
Thrust chamber device and method for operating a thrust chamber device
US-11555471-B2 · Jan 17, 2023 · US
Onboard structure convertible into a propellant for electric propulsion
US-11542926-B2 · Jan 3, 2023 · US
Active on orbit fluid propellant management and refueling systems and methods
US-2022355954-A1 · Nov 10, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02K9/42?
- CPC F02K9/42 is the Cooperative Patent Classification code for “using liquid or gaseous propellants (F02K9/72 takes precedence).”
- How many patents are filed under CPC F02K9/42 (using liquid or gaseous propellants (F02K9/72 takes precedence))?
- Our database includes 78 publications tagged with this CPC code.
- Is patent activity under CPC F02K9/42 growing?
- Publication counts under this code: 12 in 2024 vs 15 in 2025 (latest complete years).