Apparatus for purifying gas
US-2023256387-A1 · Aug 17, 2023 · US
displacing elastic fluids
displacing elastic fluids · 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 | F04F5/04 |
| Official title | displacing elastic fluids |
| Display label | displacing elastic fluids |
| Total patents | 66 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 6 |
| 2017 | 11 |
| 2018 | 5 |
| 2019 | 13 |
| 2020 | 6 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and apparatus for purifying gas
US-11660569-B2 · May 30, 2023 · US
Ejector
US-11549522-B2 · Jan 10, 2023 · US
Ejector and vacuum generating device including the same
US-2022403856-A1 · Dec 22, 2022 · US
Ejector module
US-11480197-B2 · Oct 25, 2022 · US
Electrolytic device
US-11479868-B2 · Oct 25, 2022 · US
Ejector nozzle and use of the ejector nozzle
US-11400326-B2 · Aug 2, 2022 · US
Ejector and refrigeration system
US-11365915-B2 · Jun 21, 2022 · US
Liquid and/or gaseous fuel delivery system and methods thereof
US-11293336-B2 · Apr 5, 2022 · US
Generator with jet pump having motive fluid for fluidly coupling to a cooling circuit
US-11155357-B2 · Oct 26, 2021 · US
Jet pump
US-2021317845-A1 · Oct 14, 2021 · US
Ejector, ejector production method, and method for setting diffuser outlet flow path
US-11131326-B2 · Sep 28, 2021 · US
Liquid and/or gaseous fuel delivery system and methods therof
US-2021277820-A1 · Sep 9, 2021 · US
Ejector
US-11053956-B2 · Jul 6, 2021 · US
Ejector and refrigeration system
US-2020292219-A1 · Sep 17, 2020 · US
Ejector
US-10767905-B2 · Sep 8, 2020 · US
Generator with jet pump
US-2020216186-A1 · Jul 9, 2020 · US
Electrolytic device
US-2020157694-A1 · May 21, 2020 · US
Liquid ejector and ejector refrigeration cycle
US-10603985-B2 · Mar 31, 2020 · US
Method and apparatus for purifying gas
US-2020078730-A1 · Mar 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04F5/04?
- CPC F04F5/04 is the Cooperative Patent Classification code for “displacing elastic fluids.”
- How many patents are filed under CPC F04F5/04 (displacing elastic fluids)?
- Our database includes 66 publications tagged with this CPC code.
- Is patent activity under CPC F04F5/04 growing?
- Publication counts under this code: 2 in 2024 vs 4 in 2025 (latest complete years).