Floating counter-rotating vortex-eliminating device for pump station, and pump station
US-12385504-B2 · Aug 12, 2025 · US
especially adapted for liquid pumps
especially adapted for liquid 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 | F04D29/688 |
| Official title | {especially adapted for liquid pumps} |
| Display label | especially adapted for liquid pumps |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 1 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 4 |
| 2024 | 2 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Floating counter-rotating vortex-eliminating device for pump station, and pump station
US-2025237237-A1 · Jul 24, 2025 · US
Short impeller for a turbomachine
US-12352290-B2 · Jul 8, 2025 · US
Centrifugal pump and a pump housing
US-12188475-B2 · Jan 7, 2025 · US
Short impeller for a turbomachine
US-2024410397-A1 · Dec 12, 2024 · US
Short impeller for a turbomachine
US-11933323-B2 · Mar 19, 2024 · US
Multistage centrifugal pump
US-11788533-B2 · Oct 17, 2023 · US
Impeller
US-11773864-B2 · Oct 3, 2023 · US
Electrical submersible pump with liquid-gas homogenizer
US-11767850-B2 · Sep 26, 2023 · US
Multistage centrifugal pump
US-2023011820-A1 · Jan 12, 2023 · US
Semi-open centrifugal pump impeller and its optimization design
US-11525454-B2 · Dec 13, 2022 · US
Optimizing pumping of variable viscosities via microtextured miniaturized tesla pump
US-11519413-B2 · Dec 6, 2022 · US
Permanent magnet direct-drive slurry pump based on gas film drag reduction
US-11371522-B2 · Jun 28, 2022 · US
Impeller
US-2022163048-A1 · May 26, 2022 · US
Permanent magnet direct-drive slurry pump based on gas film drag reduction
US-2022154733-A1 · May 19, 2022 · US
Pump with housing having internal grooves
US-11236764-B2 · Feb 1, 2022 · US
Optimizing pumping of variable viscosities via microtextured miniaturized tesla pump
US-2021363997-A1 · Nov 25, 2021 · US
Electrical submersible pump with liquid-gas homogenizer
US-2021246903-A1 · Aug 12, 2021 · US
Centrifugal pump and a pump housing
US-2021079922-A1 · Mar 18, 2021 · US
Suction pipe inlet device for centrifugal pump
US-10907639-B2 · Feb 2, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/688?
- CPC F04D29/688 is the Cooperative Patent Classification code for “especially adapted for liquid pumps.”
- How many patents are filed under CPC F04D29/688 (especially adapted for liquid pumps)?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/688 growing?
- Publication counts under this code: 2 in 2024 vs 4 in 2025 (latest complete years).