Pumped heat energy storage system integrated with coal-fired energy generation unit
US-2025116211-A1 · Apr 10, 2025 · US
the engine being of extraction or non-condensing type {(F01K3/004 takes precedence)}
the engine being of extraction or non-condensing type {(F01K3/004 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 | F01K3/06 |
| Official title | the engine being of extraction or non-condensing type {(F01K3/004 takes precedence)} |
| Display label | the engine being of extraction or non-condensing type {(F01K3/004 takes precedence)} |
| Total patents | 59 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 8 |
| 2019 | 10 |
| 2020 | 3 |
| 2021 | 7 |
| 2022 | 5 |
| 2023 | 7 |
| 2024 | 5 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Long-duration phes systems with modular configurations
US-2025101886-A1 · Mar 27, 2025 · US
Dual-powertrain pumped heat energy storage with inventory control and purge
US-2025084773-A1 · Mar 13, 2025 · US
Power generation facility
US-2025012207-A1 · Jan 9, 2025 · US
Pumped heat energy storage system with modular turbomachinery
US-12123327-B2 · Oct 22, 2024 · US
Variable pressure inventory control of closed cycle system with a high pressure tank and an intermediate pressure tank
US-2024337220-A1 · Oct 10, 2024 · US
Variable pressure inventory control of closed cycle system with a high pressure tank and an intermediate pressure tank
US-12012902-B2 · Jun 18, 2024 · US
Dual-powertrain pumped heat energy storage with inventory control and purge
US-2024159168-A1 · May 16, 2024 · US
Power generation facility
US-2024117759-A1 · Apr 11, 2024 · US
Pumped heat electric storage system with recirculation
US-11852043-B2 · Dec 26, 2023 · US
Particle-based thermal energy storage systems
US-11808523-B2 · Nov 7, 2023 · US
Pumped heat energy storage system with modular turbomachinery
US-2023279786-A1 · Sep 7, 2023 · US
Use of external air for closed cycle inventory control
US-2023203966-A1 · Jun 29, 2023 · US
Pumped heat energy storage system with modular turbomachinery
US-2023203969-A1 · Jun 29, 2023 · US
Storage of excess heat in cold side of heat engine
US-2023101306-A1 · Mar 30, 2023 · US
Use of external air for closed cycle inventory control
US-11578622-B2 · Feb 14, 2023 · US
Pumped heat electric storage system
US-2022389839-A1 · Dec 8, 2022 · US
Storage of excess heat in cold side of heat engine
US-11512613-B2 · Nov 29, 2022 · US
Variable pressure inventory control of closed cycle system with a high pressure tank and an intermediate pressure tank
US-2022349355-A1 · Nov 3, 2022 · US
Variable pressure inventory control of closed cycle system with a high pressure tank and an intermediate pressure tank
US-11371442-B2 · Jun 28, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01K3/06?
- CPC F01K3/06 is the Cooperative Patent Classification code for “the engine being of extraction or non-condensing type {(F01K3/004 takes precedence)}.”
- How many patents are filed under CPC F01K3/06 (the engine being of extraction or non-condensing type {(F01K3/004 takes precedence)})?
- Our database includes 59 publications tagged with this CPC code.
- Is patent activity under CPC F01K3/06 growing?
- Publication counts under this code: 5 in 2024 vs 4 in 2025 (latest complete years).