Heat engine using a liquid-vapor-phase-changing material
US-2026043340-A1 · Feb 12, 2026 · US
Arrangements or modifications of condensate or air pumps
Arrangements or modifications of condensate or air pumps · 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 | F01K9/02 |
| Official title | Arrangements or modifications of condensate or air pumps |
| Display label | Arrangements or modifications of condensate or air pumps |
| Total patents | 57 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 7 |
| 2019 | 7 |
| 2020 | 6 |
| 2021 | 4 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 3 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Collecting apparatus, condensation equipment, and collecting method
US-12546537-B2 · Feb 10, 2026 · US
Ship cogeneration system using waste heat of LNG engine ship recovered through economizer
US-12546237-B2 · Feb 10, 2026 · US
Ship waste heat power generation system utilizing waste heat from ships
US-2025198314-A1 · Jun 19, 2025 · US
Two-phase thermal pump
US-2025188853-A1 · Jun 12, 2025 · US
Two-phase thermal pump
US-12264601-B2 · Apr 1, 2025 · US
Method for cleaning steam system of combined cycle plant
US-12129792-B2 · Oct 29, 2024 · US
Ship cogeneration system using waste heat of lng engine ship recovered through economizer
US-2024240576-A1 · Jul 18, 2024 · US
Method for cleaning steam system of combined cycle plant
US-2024229677-A9 · Jul 11, 2024 · US
Collecting apparatus, condensation equipment, and collecting method
US-2024151471-A1 · May 9, 2024 · US
Method for cleaning steam system of combined cycle plant
US-2024133316-A1 · Apr 25, 2024 · US
Electric vehicle including Rankine cycle
US-11845361-B2 · Dec 19, 2023 · US
Two-phase thermal pump
US-2023203970-A1 · Jun 29, 2023 · US
Two-phase thermal pump
US-11619146-B2 · Apr 4, 2023 · US
Electric vehicle including rankine cycle
US-2022314815-A1 · Oct 6, 2022 · US
Gland steam condenser for a combined cycle power plant and methods of operating the same
US-11371395-B2 · Jun 28, 2022 · US
Gland steam condenser for a combined cycle power plant and methods of operating the same
US-2022065138-A1 · Mar 3, 2022 · US
Combined cycle power plant having condensate recirculation pump using venturi effect
US-11041409-B2 · Jun 22, 2021 · US
Condensate recirculation
US-11008897-B2 · May 18, 2021 · US
Two-phase thermal pump
US-2021079814-A1 · Mar 18, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01K9/02?
- CPC F01K9/02 is the Cooperative Patent Classification code for “Arrangements or modifications of condensate or air pumps.”
- How many patents are filed under CPC F01K9/02 (Arrangements or modifications of condensate or air pumps)?
- Our database includes 57 publications tagged with this CPC code.
- Is patent activity under CPC F01K9/02 growing?
- Publication counts under this code: 5 in 2024 vs 3 in 2025 (latest complete years).