Water Pump
US-2026085693-A1 · Mar 26, 2026 · US
flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect
flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect · 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 | F04D29/2255 |
| Official title | {flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect} |
| Display label | flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect |
| Total patents | 52 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 10 |
| 2017 | 4 |
| 2018 | 7 |
| 2019 | 5 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electrical submersible pump with single direction lubricant flow
US-12480498-B2 · Nov 25, 2025 · US
Pump for conveying wastewater and impeller for such a pump
US-12320364-B2 · Jun 3, 2025 · US
Pump for conveying wastewater and impeller for such a pump
US-2024191723-A1 · Jun 13, 2024 · US
Electrical submersible pump with single direction lubricant flow
US-2024125219-A1 · Apr 18, 2024 · US
Impeller for electric water pump
US-11873819-B2 · Jan 16, 2024 · US
Single suction centrifugal blower
US-11852163-B2 · Dec 26, 2023 · US
Compressor interstage throttle, and method of operating therof
US-11841026-B2 · Dec 12, 2023 · US
Impeller
US-11713769-B2 · Aug 1, 2023 · US
Compressor interstage throttle, and method of operating therof
US-2023139727-A1 · May 4, 2023 · US
Electric pump with isolated stator
US-2023065642-A1 · Mar 2, 2023 · US
High efficiency double suction impeller
US-11536273-B2 · Dec 27, 2022 · US
Diffuser pipe with axially-directed exit
US-11435079-B2 · Sep 6, 2022 · US
Impeller
US-2021324870-A1 · Oct 21, 2021 · US
Single suction centrifugal blower
US-2021239128-A1 · Aug 5, 2021 · US
High efficiency double suction impeller
US-2021190073-A1 · Jun 24, 2021 · US
Diffuser pipe with axially-directed exit
US-2020393129-A1 · Dec 17, 2020 · US
Hydrodynamic thrust bearings for rotary blood pump
US-10731652-B2 · Aug 4, 2020 · US
Impeller for electric water pump
US-2020116151-A1 · Apr 16, 2020 · US
Impeller, centrifugal pump and electric pump
US-10590947-B2 · Mar 17, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/2255?
- CPC F04D29/2255 is the Cooperative Patent Classification code for “flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect.”
- How many patents are filed under CPC F04D29/2255 (flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect)?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/2255 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).