Electron propulsion engine and method of operation thereof
US-12384563-B1 · Aug 12, 2025 · US
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Subject matter not provided for in other groups of this subclass
Subject matter not provided for in other groups of this subclass · 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 | F03H99/00 |
| Official title | Subject matter not provided for in other groups of this subclass |
| Display label | Subject matter not provided for in other groups of this subclass |
| Total patents | 17 |
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 | 2 |
| 2017 | 2 |
| 2018 | 2 |
| 2020 | 3 |
| 2021 | 1 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Magnetohydrodynamic seawater propulsion thruster
US-2025115344-A1 · Apr 10, 2025 · US
Propulsion apparatus
US-2025035094-A1 · Jan 30, 2025 · US
Spacecraft-borne propulsion device
US-2024400234-A1 · Dec 5, 2024 · US
Spacecraft propulsion and positioner simulator
US-2024124167-A1 · Apr 18, 2024 · US
Thermal control system for reentry vehicles
US-2023166872-A1 · Jun 1, 2023 · US
Electrically controlled interfacial force generation device and propulsion engine
US-2021301796-A1 · Sep 30, 2021 · US
Vapor jet system enabling jetting for many seconds using multiple kinds of mutually insoluble liquid gases as fuel
US-10870502-B2 · Dec 22, 2020 · US
Membrane template synthesis of microtube engines
US-10851463-B2 · Dec 1, 2020 · US
Propulsion apparatus using sound radiation force and control method therefor
US-10537917-B2 · Jan 21, 2020 · US
Membrane template synthesis of microtube engines
US-2018347057-A1 · Dec 6, 2018 · US
Membrane template synthesis of microtube engines
US-9982356-B2 · May 29, 2018 · US
Vapor jet system enabling jetting for many seconds using multiple kinds of mutually insoluble liquid gases as fuel
US-2017073089-A1 · Mar 16, 2017 · US
Membrane template synthesis of microtube engines
US-2017022620-A1 · Jan 26, 2017 · US
Membrane template synthesis of microtube engines
US-9347143-B2 · May 24, 2016 · US
Hall-effect motor in which the temperature of the cathode-heating device is controlled
US-9309871-B2 · Apr 12, 2016 · US
Field-ionization based electrical space ion thruster using a permeable substrate
US-9194379-B1 · Nov 24, 2015 · US