Rocket engine
US-12473875-B2 · Nov 18, 2025 · US
using liquid and solid propellants, i.e. hybrid rocket-engine plants
using liquid and solid propellants, i.e. hybrid rocket-engine plants · 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 | F02K9/72 |
| Official title | using liquid and solid propellants, i.e. hybrid rocket-engine plants |
| Display label | using liquid and solid propellants, i.e. hybrid rocket-engine plants |
| Total patents | 28 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 5 |
| 2017 | 2 |
| 2018 | 1 |
| 2020 | 9 |
| 2021 | 2 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for combusting of hybrid rocket fuel and device for combusting
US-2025043751-A1 · Feb 6, 2025 · US
Injector device for an engine device, engine device, and air- and/or spacecraft
US-11906166-B2 · Feb 20, 2024 · US
Rocket engine
US-2023213004-A1 · Jul 6, 2023 · US
Hybrid rocket
US-11473530-B2 · Oct 18, 2022 · US
Thrust augmentation of an additively manufactured hybrid rocket system using secondary oxidizer injection
US-11408376-B2 · Aug 9, 2022 · US
Hybrid rocket motor with integral oxidizer tank
US-11326556-B2 · May 10, 2022 · US
Injector device for an engine device, engine device, and air- and/or spacecraft
US-2022106928-A1 · Apr 7, 2022 · US
Solid fuel and hybrid rocket
US-2021277847-A1 · Sep 9, 2021 · US
Hybrid rocket motor with integral oxidizer tank
US-2021108598-A1 · Apr 15, 2021 · US
Reaction control vortex thruster system
US-2020400103-A1 · Dec 24, 2020 · US
Solid Rocket Motor Propellant Manufacture and Configurations
US-2020377428-A1 · Dec 3, 2020 · US
Thrust augmentation of an additively manufactured hybrid rocket system using secondary oxidizer injection
US-2020370513-A1 · Nov 26, 2020 · US
Liquid fuel metering in a hybrid rocket-like liquid rocket motor
US-10837407-B2 · Nov 17, 2020 · US
Hybrid rocket motor with integral oxidizer tank
US-10823115-B2 · Nov 3, 2020 · US
Methods and systems for restartable, hybrid-rockets
US-10774789-B2 · Sep 15, 2020 · US
Vortex hybrid rocket motor
US-2020116106-A1 · Apr 16, 2020 · US
Methods and Systems for Restartable, Hybrid-Rockets
US-2020025151-A1 · Jan 23, 2020 · US
Restartable ignition devices, systems, and methods thereof
US-10527004-B2 · Jan 7, 2020 · US
Anaerobic hybrid propulsion device with fuel present in the form of divided solids
US-9957919-B2 · May 1, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02K9/72?
- CPC F02K9/72 is the Cooperative Patent Classification code for “using liquid and solid propellants, i.e. hybrid rocket-engine plants.”
- How many patents are filed under CPC F02K9/72 (using liquid and solid propellants, i.e. hybrid rocket-engine plants)?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC F02K9/72 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).