Multistage compression system
US-2021340981-A1 · Nov 4, 2021 · US
Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (F04C25/00 takes precedence)
Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (F04C25/00 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 | F04C23/00 |
| Official title | Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (F04C25/00 takes precedence) |
| Display label | Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (F04C25/00 takes precedence) |
| Total patents | 102 |
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 | 5 |
| 2016 | 4 |
| 2017 | 8 |
| 2018 | 14 |
| 2019 | 10 |
| 2020 | 11 |
| 2021 | 13 |
| 2022 | 18 |
| 2023 | 6 |
| 2024 | 8 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multistage compression system
US-2021310701-A1 · Oct 7, 2021 · US
Screw compressor
US-11067081-B2 · Jul 20, 2021 · US
Compressor and air conditioner
US-11067083-B2 · Jul 20, 2021 · US
Screw compressor
US-11067082-B2 · Jul 20, 2021 · US
A multi-stage vacuum pump and a method of differentially pumping multiple vacuum chambers
US-2021079914-A1 · Mar 18, 2021 · US
Screw compressor
US-10947976-B2 · Mar 16, 2021 · US
Two-stage rotary compressor
US-10883501-B2 · Jan 5, 2021 · US
Modular vacuum pumping and/or abatement system
US-2020340467-A1 · Oct 29, 2020 · US
Vacuum system pipe couplings
US-2020340605-A1 · Oct 29, 2020 · US
Module for a vacuum pumping and/or abatement system
US-2020340466-A1 · Oct 29, 2020 · US
A module for a vacuum pumping and/or abatement system
US-2020300234-A1 · Sep 24, 2020 · US
Oil distribution in multiple-compressor systems utilizing variable speed
US-10760831-B2 · Sep 1, 2020 · US
Motor-driven roots pump
US-10738778-B2 · Aug 11, 2020 · US
Rotary compressor
US-2020173439-A1 · Jun 4, 2020 · US
Pressure intensifier, arrangement in an aircraft or spacecraft comprising a device driveable by a driving pressure difference, aircraft or spacecraft, and method
US-2020166027-A1 · May 28, 2020 · US
Vacuum pumping system
US-2020047225-A1 · Feb 13, 2020 · US
Oil-gas balancing apparatus and compressor system with the same
US-10557651-B2 · Feb 11, 2020 · US
Rotary compressor
US-10550843-B2 · Feb 4, 2020 · US
Compressor, air conditioning system, and a method of controlling a compressor
US-10465683-B2 · Nov 5, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C23/00?
- CPC F04C23/00 is the Cooperative Patent Classification code for “Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (F04C25/00 takes precedence).”
- How many patents are filed under CPC F04C23/00 (Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (F04C25/00 takes precedence))?
- Our database includes 102 publications tagged with this CPC code.
- Is patent activity under CPC F04C23/00 growing?
- Publication counts under this code: 8 in 2024 vs 3 in 2025 (latest complete years).