Propane dehydrogenation system with single casing reactor effluent compressor and method
US-2025207598-A1 · Jun 26, 2025 · US
the stages being situated concentrically
the stages being situated concentrically · 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 | F04D1/08 |
| Official title | the stages being situated concentrically |
| Display label | the stages being situated concentrically |
| Total patents | 48 |
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 | 1 |
| 2017 | 5 |
| 2019 | 8 |
| 2020 | 9 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 7 |
| 2024 | 6 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Motor pump
US-2024369063-A1 · Nov 7, 2024 · US
Vertical multi-stage pump
US-12110909-B2 · Oct 8, 2024 · US
Multiphase pump
US-12006949-B2 · Jun 11, 2024 · US
Process fluid lubricated pump and pumping system
US-12006946-B2 · Jun 11, 2024 · US
Motor pump, pump unit, and method of balancing impeller of motor pump
US-2024167478-A1 · May 23, 2024 · US
Pump
US-11873821-B2 · Jan 16, 2024 · US
Process fluid lubricated pump
US-11846297-B2 · Dec 19, 2023 · US
Fan Assembly and Vacuum Cleaner
US-2023332604-A1 · Oct 19, 2023 · US
Multistage centrifugal pump
US-11788533-B2 · Oct 17, 2023 · US
Multistage centrifugal grinder pump
US-11732717-B2 · Aug 22, 2023 · US
Modular compact pump
US-2023243354-A1 · Aug 3, 2023 · US
Multistage centrifugal pump for conveying a fluid
US-11649825-B2 · May 16, 2023 · US
Multistage centrifugal pump
US-2023011820-A1 · Jan 12, 2023 · US
Vertical multi-stage pump
US-2022333615-A1 · Oct 20, 2022 · US
Process fluid lubricated pump and pumping system
US-2022178381-A1 · Jun 9, 2022 · US
Pump
US-2022170476-A1 · Jun 2, 2022 · US
Compact, modular, pump or turbine with integral modular motor or generator and coaxial fluid flow
US-11323003-B2 · May 3, 2022 · US
Diffuser assembly for upward, downward and radial pump protection
US-11293455-B2 · Apr 5, 2022 · US
Single-shaft turbo compressor
US-11286948-B2 · Mar 29, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D1/08?
- CPC F04D1/08 is the Cooperative Patent Classification code for “the stages being situated concentrically.”
- How many patents are filed under CPC F04D1/08 (the stages being situated concentrically)?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC F04D1/08 growing?
- Publication counts under this code: 6 in 2024 vs 1 in 2025 (latest complete years).