Drying-up method, cooling-down method, and hot-up method for a pump apparatus
US-2025361877-A1 · Nov 27, 2025 · US
by adducting or recycling liquid (F04D9/006 takes precedence)
by adducting or recycling liquid (F04D9/006 takes precedence) · 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 | F04D9/005 |
| Official title | {by adducting or recycling liquid (F04D9/006 takes precedence)} |
| Display label | by adducting or recycling liquid (F04D9/006 takes precedence) |
| Total patents | 30 |
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 | 3 |
| 2016 | 3 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 4 |
| 2025 | 1 |
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
Multiphase pump
US-12135044-B2 · Nov 5, 2024 · US
Diaphragm wall cutter and method for cutting a cutting trench in the ground
US-2024240427-A1 · Jul 18, 2024 · US
Quick no-water startup apparatus for centrifugal pump
US-11905976-B2 · Feb 20, 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
Quick no-water startup apparatus for centrifugal pump
US-2023265850-A1 · Aug 24, 2023 · US
Method of priming a pump of an aircraft engine
US-11603842-B2 · Mar 14, 2023 · US
Quick startup device for centrifugal pump
US-11555497-B2 · Jan 17, 2023 · US
Quick startup device for centrifugal pump
US-2022325716-A1 · Oct 13, 2022 · US
Electric submersible pump with discharge recycle
US-11353028-B2 · Jun 7, 2022 · US
Centrifugal pump device
US-2021396240-A1 · Dec 23, 2021 · US
Electric submersible pump with discharge recycle
US-2021348612-A1 · Nov 11, 2021 · US
Centrifugal pump
US-11067086-B2 · Jul 20, 2021 · US
Machine for aircraft and method
US-2021048026-A1 · Feb 18, 2021 · US
High Flow and Low NPSHr Horizontal Pump with Priming Module
US-2020309135-A1 · Oct 1, 2020 · US
Centrifugal pump assembly
US-10619640-B2 · Apr 14, 2020 · US
Multiphase pump
US-2020088201-A1 · Mar 19, 2020 · US
Multi-stage, self-priming centrifugal pump assembly
US-10337516-B2 · Jul 2, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D9/005?
- CPC F04D9/005 is the Cooperative Patent Classification code for “by adducting or recycling liquid (F04D9/006 takes precedence).”
- How many patents are filed under CPC F04D9/005 (by adducting or recycling liquid (F04D9/006 takes precedence))?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC F04D9/005 growing?
- Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).