Method of starting and stopping pump apparatuses coupled in series
US-12595799-B2 · Apr 7, 2026 · US
by venting gas or using gas valves
by venting gas or using gas valves · 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 | F04D9/006 |
| Official title | {by venting gas or using gas valves} |
| Display label | by venting gas or using gas valves |
| Total patents | 30 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 5 |
| 2023 | 7 |
| 2024 | 2 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Drying-up method, cooling-down method, and hot-up method for a pump apparatus
US-2025361877-A1 · Nov 27, 2025 · US
Method of starting and stopping pump apparatuses coupled in series
US-2025341215-A1 · Nov 6, 2025 · US
Priming system for infusion devices
US-12390582-B2 · Aug 19, 2025 · US
Self-priming apparatus for quick no-water startup
US-12158166-B2 · Dec 3, 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
Pressure-controlling device, and pressure-using apparatus
US-11698066-B2 · Jul 11, 2023 · US
Debris trap for capturing debris flowing in a stream of liquid and priming assembly for a pump
US-11649835-B2 · May 16, 2023 · US
Quick startup device for centrifugal pump
US-11555497-B2 · Jan 17, 2023 · US
Priming System for Infusion Devices
US-2023011520-A1 · Jan 12, 2023 · US
Debris trap for capturing debris flowing in a stream of liquid and priming assembly for a pump
US-2022333616-A1 · Oct 20, 2022 · US
Quick startup device for centrifugal pump
US-2022325716-A1 · Oct 13, 2022 · US
Priming system for infusion devices
US-11389584-B2 · Jul 19, 2022 · US
Self-orienting gas evading intake for submersible pumps
US-11313209-B2 · Apr 26, 2022 · US
Fuel pump with vapor purge valve assembly
US-11236716-B2 · Feb 1, 2022 · US
Centrifugal pump device
US-2021396240-A1 · Dec 23, 2021 · US
Turbo pump vent assembly and method
US-11149736-B2 · Oct 19, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D9/006?
- CPC F04D9/006 is the Cooperative Patent Classification code for “by venting gas or using gas valves.”
- How many patents are filed under CPC F04D9/006 (by venting gas or using gas valves)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC F04D9/006 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).