Hydraulic pumping system with piston displacement sensing and control
US-2021340972-A1 · Nov 4, 2021 · US
the fluid being liquid
the fluid being liquid · 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 | F04B9/10 |
| Official title | the fluid being liquid |
| Display label | the fluid being liquid |
| Total patents | 97 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 6 |
| 2017 | 13 |
| 2018 | 7 |
| 2019 | 12 |
| 2020 | 10 |
| 2021 | 14 |
| 2022 | 10 |
| 2023 | 7 |
| 2024 | 5 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-2021207588-A1 · Jul 8, 2021 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-10989180-B2 · Apr 27, 2021 · US
Electrowetting-based pump
US-10989181-B1 · Apr 27, 2021 · US
Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods
US-2021079902-A1 · Mar 18, 2021 · US
Method for operating a piston compressor, and piston compressor
US-2020309116-A1 · Oct 1, 2020 · US
Cryogenic pump
US-10788026-B2 · Sep 29, 2020 · US
Slant mounted hydraulic pumping system
US-10760388-B2 · Sep 1, 2020 · US
Method and apparatus for determining a movement direction of a component of a mechanism
US-10723446-B2 · Jul 28, 2020 · US
System For Producing And Dispensing Pressurized Hydrogen
US-2020132254-A1 · Apr 30, 2020 · US
Distributer phase shifter for a hydraulic pump motor
US-10632829-B2 · Apr 28, 2020 · US
Hydraulic pumping system with detection of fluid in gas volume
US-10619464-B2 · Apr 14, 2020 · US
Linear Hydraulic Pump and Its Application in Well Pressure Control
US-2020088187-A1 · Mar 19, 2020 · US
Hydraulic pump for ophthalmic surgery
US-10537471-B2 · Jan 21, 2020 · US
Linear hydraulic pump and its application in well pressure control
US-10533548-B2 · Jan 14, 2020 · US
System for pump protection with a hydraulic turbocharger
US-10473095-B2 · Nov 12, 2019 · US
Linear Hydraulic Pump for Submersible Applications
US-2019323499-A1 · Oct 24, 2019 · US
Metering for fluid motor and pump combination
US-10371137-B2 · Aug 6, 2019 · US
Fluid pressure producing method and fluid pressure producing device
US-10352309-B2 · Jul 16, 2019 · US
Improved distribution unit
US-2019211814-A1 · Jul 11, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B9/10?
- CPC F04B9/10 is the Cooperative Patent Classification code for “the fluid being liquid.”
- How many patents are filed under CPC F04B9/10 (the fluid being liquid)?
- Our database includes 97 publications tagged with this CPC code.
- Is patent activity under CPC F04B9/10 growing?
- Publication counts under this code: 5 in 2024 vs 6 in 2025 (latest complete years).