Equal-walled gerotor pump for wellbore applications
US-2019390669-A1 · Dec 26, 2019 · US
of the rotor
of the rotor · 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 | F04C2250/20 |
| Official title | of the rotor |
| Display label | of the rotor |
| Total patents | 158 |
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 | 6 |
| 2016 | 4 |
| 2017 | 13 |
| 2018 | 13 |
| 2019 | 29 |
| 2020 | 20 |
| 2021 | 28 |
| 2022 | 14 |
| 2023 | 12 |
| 2024 | 13 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotor for a positive displacement compressor
US-10514036-B2 · Dec 24, 2019 · US
Optimized helix angle rotors for roots-style supercharger
US-2019383287-A1 · Dec 19, 2019 · US
Compressor
US-2019376514-A1 · Dec 12, 2019 · US
Compressor having enhanced wrap structure
US-2019345933-A1 · Nov 14, 2019 · US
Co-rotating scroll compressor
US-2019345934-A1 · Nov 14, 2019 · US
Motor vehicle vacuum pump arrangement
US-2019323506-A1 · Oct 24, 2019 · US
Optimized helix angle rotors for roots-style supercharger
US-10436197-B2 · Oct 8, 2019 · US
Compressor
US-2019301449-A1 · Oct 3, 2019 · US
Compressor
US-2019301450-A1 · Oct 3, 2019 · US
Vane oil pump
US-2019242378-A1 · Aug 8, 2019 · US
Impeller
US-2019242379-A1 · Aug 8, 2019 · US
Hollow rotor lobe and control of tip deflection
US-2019203708-A1 · Jul 4, 2019 · US
Method for Modifying Performance of Rotor Profile by Adjusting Meshing Line Segments
US-2019186487-A1 · Jun 20, 2019 · US
Stator and rotor profile for improved power section performance and reliability
US-2019186204-A1 · Jun 20, 2019 · US
Oil pump
US-2019178246-A1 · Jun 13, 2019 · US
Fluid Machine
US-2019170143-A1 · Jun 6, 2019 · US
Volume pulsed deformation plasticating and conveying method and device by eccentric rotor
US-10307950-B2 · Jun 4, 2019 · US
Vane pump
US-2019101117-A1 · Apr 4, 2019 · US
Oscillating piston-type compressor
US-2019085845-A1 · Mar 21, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C2250/20?
- CPC F04C2250/20 is the Cooperative Patent Classification code for “of the rotor.”
- How many patents are filed under CPC F04C2250/20 (of the rotor)?
- Our database includes 158 publications tagged with this CPC code.
- Is patent activity under CPC F04C2250/20 growing?
- Publication counts under this code: 13 in 2024 vs 5 in 2025 (latest complete years).