Fuel cell pump
US-2025210677-A1 · Jun 26, 2025 · US
with similar tooth forms (F04C18/16 takes precedence)
with similar tooth forms (F04C18/16 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 | F04C18/18 |
| Official title | with similar tooth forms (F04C18/16 takes precedence) |
| Display label | with similar tooth forms (F04C18/16 takes precedence) |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 2 |
| 2019 | 10 |
| 2021 | 3 |
| 2022 | 6 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compressor assembly comprising a motor driving one or more compressor rotors
US-2025192646-A1 · Jun 12, 2025 · US
Gear pump with suction housing element providing a tight seal between suction and high-pressure chamber to increase pump efficiency and method of providing tight seal
US-12313071-B1 · May 27, 2025 · US
Variable capacity screw compressor and method
US-11933301-B2 · Mar 19, 2024 · US
Electric pump
US-11905954-B2 · Feb 20, 2024 · US
Variable capacity screw compressor and method
US-2023228269-A1 · Jul 20, 2023 · US
Fluid working systems
US-11655816-B2 · May 23, 2023 · US
Element for compressing or expanding a gas and method for controlling such element
US-11572878-B2 · Feb 7, 2023 · US
Fluid working systems
US-11499552-B2 · Nov 15, 2022 · US
Variable capacity screw compressor and method
US-11486396-B2 · Nov 1, 2022 · US
Electric pump
US-2022186728-A1 · Jun 16, 2022 · US
Element for compressing or expanding a gas and method for controlling such element
US-2022186729-A1 · Jun 16, 2022 · US
Vacuum pump screw rotors with symmetrical profiles on low pitch sections
US-11293435-B2 · Apr 5, 2022 · US
Optimized helix angle rotors for roots-style supercharger
US-11286932-B2 · Mar 29, 2022 · US
Variable capacity screw compressor and method
US-2021285447-A1 · Sep 16, 2021 · US
Variable capacity screw compressor and method
US-11022117-B2 · Jun 1, 2021 · US
Variable capacity screw compressor and method
US-10941770-B2 · Mar 9, 2021 · US
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
Screw compressor
US-10480511-B2 · Nov 19, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C18/18?
- CPC F04C18/18 is the Cooperative Patent Classification code for “with similar tooth forms (F04C18/16 takes precedence).”
- How many patents are filed under CPC F04C18/18 (with similar tooth forms (F04C18/16 takes precedence))?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC F04C18/18 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).