Methods of operating a rotating detonation combustor at approximately constant detonation cell size
US-2018356093-A1 · Dec 13, 2018 · US
Pressure exchangers
Pressure exchangers · 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 | F04F13/00 |
| Official title | Pressure exchangers |
| Display label | Pressure exchangers |
| Total patents | 217 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 27 |
| 2017 | 17 |
| 2018 | 20 |
| 2019 | 23 |
| 2020 | 17 |
| 2021 | 19 |
| 2022 | 23 |
| 2023 | 20 |
| 2024 | 18 |
| 2025 | 21 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System for using pressure exchanger in dual gradient drilling application
US-10072675-B2 · Sep 11, 2018 · US
System and method for improved duct pressure transfer in pressure exchange system
US-2018252239-A1 · Sep 6, 2018 · US
Frac system with hydraulic energy transfer system
US-2018209254-A1 · Jul 26, 2018 · US
System and method for offshore (topside or subsea) and onshore water reinjection for secondary recovery
US-9975789-B2 · May 22, 2018 · US
System for using pressure exchanger in mud pumping application
US-2018094648-A1 · Apr 5, 2018 · US
Methods and systems for pressurizing harsh fluids
US-2018030968-A1 · Feb 1, 2018 · US
Pressure exchanger as choke
US-2017350428-A1 · Dec 7, 2017 · US
Rotary isobaric pressure exchanger system with lubrication system
US-9835018-B2 · Dec 5, 2017 · US
Rotary isobaric pressure exchanger system with flush system
US-2017335668-A1 · Nov 23, 2017 · US
Ignition System For Constant Volume Combustor
US-2017314463-A1 · Nov 2, 2017 · US
System for using pressure exchanger in dual gradient drilling application
US-2017306986-A1 · Oct 26, 2017 · US
System for integrating valves and flow manifold into housing of pressure exchanger
US-2017306987-A1 · Oct 26, 2017 · US
System and method for offshore (topside or subsea) and onshore water reinjection for secondary recovery
US-2017267549-A1 · Sep 21, 2017 · US
System and method for utilizing integrated pressure exchange manifold in hydraulic fracturing
US-9759054-B2 · Sep 12, 2017 · US
Rotary isobaric pressure exchanger system with flush system
US-9739128-B2 · Aug 22, 2017 · US
Thermal and thrust management in dynamic pressure exchangers
US-2017234540-A1 · Aug 17, 2017 · US
Pressure exchange noise reduction
US-9695795-B2 · Jul 4, 2017 · US
Pressure exchange system with hydraulic drive system
US-2017130743-A1 · May 11, 2017 · US
Portable power tool
US-2017113338-A1 · Apr 27, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04F13/00?
- CPC F04F13/00 is the Cooperative Patent Classification code for “Pressure exchangers.”
- How many patents are filed under CPC F04F13/00 (Pressure exchangers)?
- Our database includes 217 publications tagged with this CPC code.
- Is patent activity under CPC F04F13/00 growing?
- Publication counts under this code: 18 in 2024 vs 21 in 2025 (latest complete years).