Centrifugal pump impeller with tapered shroud
US-12523235-B2 · Jan 13, 2026 · US
for influencing flow or boundary layer
for influencing flow or boundary layer · 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 | F04D29/2272 |
| Official title | {for influencing flow or boundary layer} |
| Display label | for influencing flow or boundary layer |
| Total patents | 36 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 4 |
| 2020 | 5 |
| 2021 | 3 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Centrifugal slurry pump impeller shroud with lip
US-12352281-B2 · Jul 8, 2025 · US
Pump for conveying wastewater and impeller for such a pump
US-12320364-B2 · Jun 3, 2025 · US
Two-stage cavitation generator for organic wastewater treatment
US-12228139-B2 · Feb 18, 2025 · US
Centrifugal Slurry Pump Impeller Shroud With Lip
US-2024254999-A1 · Aug 1, 2024 · US
Centrifugal Pump Impeller With Tapered Shroud
US-2024255000-A1 · Aug 1, 2024 · US
Two-stage cavitation generator for organic wastewater treatment
US-2024218883-A1 · Jul 4, 2024 · US
Pump for conveying wastewater and impeller for such a pump
US-2024191723-A1 · Jun 13, 2024 · US
Impeller for a centrifugal pump
US-11713768-B1 · Aug 1, 2023 · US
Particle guard ring for mixed flow pump
US-11692551-B2 · Jul 4, 2023 · US
Waste water pump
US-11359639-B2 · Jun 14, 2022 · US
Impeller and centrifugal pump
US-11346358-B2 · May 31, 2022 · US
Centrifugal pump with adaptive pump stages
US-11268520-B2 · Mar 8, 2022 · US
Centrifugal pump with adaptive pump stages
US-11268519-B2 · Mar 8, 2022 · US
Particle guard ring for mixed flow pump
US-2021310493-A1 · Oct 7, 2021 · US
Particle guard ring for mixed flow pump
US-11041496-B2 · Jun 22, 2021 · US
Centrifugal pump with serrated impeller
US-10907647-B2 · Feb 2, 2021 · US
Impeller and centrifugal pump
US-2020378405-A1 · Dec 3, 2020 · US
Centrifugal turbo machinery
US-10801520-B2 · Oct 13, 2020 · US
Centrifugal pump with adaptive pump stages
US-2020141414-A1 · May 7, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/2272?
- CPC F04D29/2272 is the Cooperative Patent Classification code for “for influencing flow or boundary layer.”
- How many patents are filed under CPC F04D29/2272 (for influencing flow or boundary layer)?
- Our database includes 36 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/2272 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).