Multistage variable burning rate solid rocket motor and forming method
US-12454928-B2 · Oct 28, 2025 · US
made of two or more portions burning at different rates {or having different characteristics}
made of two or more portions burning at different rates {or having different characteristics} · 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 | F02K9/12 |
| Official title | made of two or more portions burning at different rates {or having different characteristics} |
| Display label | made of two or more portions burning at different rates {or having different characteristics} |
| Total patents | 42 |
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 | 3 |
| 2016 | 5 |
| 2017 | 1 |
| 2018 | 6 |
| 2019 | 5 |
| 2020 | 8 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multistage variable burning rate solid rocket motor and forming method
US-2025084806-A1 · Mar 13, 2025 · US
Multi-stage propellant systems, assemblies, and methods
US-11884408-B2 · Jan 30, 2024 · US
Propulsion system with grooved inert rods for reactive wire
US-11746728-B1 · Sep 5, 2023 · US
Rocket motor with embedded burnable cutting explosive energetic material
US-11732676-B1 · Aug 22, 2023 · US
Multi-stage propellant systems, assemblies, and methods
US-2023166851-A1 · Jun 1, 2023 · US
Solid-propellant gas generator assemblies and methods
US-11512645-B2 · Nov 29, 2022 · US
Hybrid rocket
US-11473530-B2 · Oct 18, 2022 · US
2-pulse gas generator and method of measuring propellant combustion surface position
US-11326557-B2 · May 10, 2022 · US
Solid-propellant gas generator assemblies and methods
US-2021277831-A1 · Sep 9, 2021 · US
Solid fuel and hybrid rocket
US-2021277847-A1 · Sep 9, 2021 · US
Integral variable performance propellant grain
US-10982625-B2 · Apr 20, 2021 · US
Boost thrust rocket motor
US-2021102790-A1 · Apr 8, 2021 · US
Methods of forming flexible structures for a rocket motor assembly
US-10934973-B2 · Mar 2, 2021 · US
Liquid fuel metering in a hybrid rocket-like liquid rocket motor
US-10837407-B2 · Nov 17, 2020 · US
Propellant charge or grain with printed energetic material layers
US-10759719-B2 · Sep 1, 2020 · US
Rocket motor with concentric propellant structures for shock mitigation
US-10731604-B2 · Aug 4, 2020 · US
Additive manufactured combustible element with fuel and oxidizer
US-10654762-B2 · May 19, 2020 · US
End-burning propellant grain with area-enhanced burning surface
US-10570069-B2 · Feb 25, 2020 · US
Electrically operated propellant for solid rocket motor thrust management
US-10563617-B2 · Feb 18, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02K9/12?
- CPC F02K9/12 is the Cooperative Patent Classification code for “made of two or more portions burning at different rates {or having different characteristics}.”
- How many patents are filed under CPC F02K9/12 (made of two or more portions burning at different rates {or having different characteristics})?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC F02K9/12 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).