Self-priming assembly for use in a multi-stage pump
US-12168986-B2 · Dec 17, 2024 · US
Self-priming pumps
Self-priming 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 | F04D9/02 |
| Official title | Self-priming pumps |
| Display label | Self-priming pumps |
| Total patents | 63 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 7 |
| 2017 | 5 |
| 2018 | 6 |
| 2019 | 4 |
| 2020 | 9 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 9 |
| 2024 | 6 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Self-priming apparatus for quick no-water startup
US-12158166-B2 · Dec 3, 2024 · US
Driven gas-liquid separation starting device
US-12146509-B2 · Nov 19, 2024 · US
Primer pump assembly and a method of cooling a marine vessel
US-2024344519-A1 · Oct 17, 2024 · US
Driven gas-liquid separation starting device
US-2024287991-A1 · Aug 29, 2024 · US
Self-priming apparatus for quick no-water startup
US-2023313801-A1 · Oct 5, 2023 · US
Centrifugal pump device
US-11746795-B2 · Sep 5, 2023 · US
Pneumatic type water-free starting self-priming device
US-11739755-B2 · Aug 29, 2023 · US
Quick no-water startup apparatus for centrifugal pump
US-2023265850-A1 · Aug 24, 2023 · US
Pneumatic type water-free starting self-priming device
US-2023243355-A1 · Aug 3, 2023 · US
Self-priming assembly for use in a multi-stage pump
US-2023160397-A1 · May 25, 2023 · US
Self-priming assembly for use in a multi-stage pump
US-11560902-B2 · Jan 24, 2023 · US
Non-return valve
US-11555553-B2 · Jan 17, 2023 · US
Quick startup device for centrifugal pump
US-11555497-B2 · Jan 17, 2023 · US
Self-priming starting device for centrifugal pump
US-11480180-B2 · Oct 25, 2022 · US
Quick startup device for centrifugal pump
US-2022325716-A1 · Oct 13, 2022 · US
Priming protection
US-11391281-B2 · Jul 19, 2022 · US
Self-priming starting device for centrifugal pump
US-2022120280-A1 · Apr 21, 2022 · US
Gas-lock re-prime shaft passage in submersible well pump and method of re-priming the pump
US-11268516-B2 · Mar 8, 2022 · US
Pump casing with adaptive primer and impeller
US-11261870-B2 · Mar 1, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D9/02?
- CPC F04D9/02 is the Cooperative Patent Classification code for “Self-priming pumps.”
- How many patents are filed under CPC F04D9/02 (Self-priming pumps)?
- Our database includes 63 publications tagged with this CPC code.
- Is patent activity under CPC F04D9/02 growing?
- Publication counts under this code: 6 in 2024 vs 2 in 2025 (latest complete years).