Method
US-2026092610-A1 · Apr 2, 2026 · US
Liquid ports
Liquid ports · 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 | F15B2201/41 |
| Official title | Liquid ports |
| Display label | Liquid ports |
| Total patents | 39 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 6 |
| 2019 | 6 |
| 2020 | 4 |
| 2021 | 4 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 7 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydraulic accumulator
US-12383911-B2 · Aug 12, 2025 · US
Hydraulic Accumulator
US-2025250995-A1 · Aug 7, 2025 · US
Hydraulic accumulator
US-12331760-B2 · Jun 17, 2025 · US
Accumulator for a chassis-level cooling system
US-2025159840-A1 · May 15, 2025 · US
Hydraulic Accumulator
US-2025092885-A1 · Mar 20, 2025 · US
Manufacturing method and exterior body of accumulator
US-2025067282-A1 · Feb 27, 2025 · US
Hydraulic Accumulator
US-2025065340-A1 · Feb 27, 2025 · US
Hydraulic Accumulator
US-2024318669-A1 · Sep 26, 2024 · US
Hydraulic Accumulator
US-2024035490-A1 · Feb 1, 2024 · US
Accumulator for a chassis-level cooling system
US-2023262928-A1 · Aug 17, 2023 · US
Hydraulic control unit having fill port
US-11078928-B2 · Aug 3, 2021 · US
Accumulator
US-11047399-B2 · Jun 29, 2021 · US
Accumulator
US-10927855-B2 · Feb 23, 2021 · US
Accumulator
US-10914323-B2 · Feb 9, 2021 · US
Engineered tissue substitute system
US-10865811-B2 · Dec 15, 2020 · US
Accumulator
US-2020158144-A1 · May 21, 2020 · US
Gaseous fuel vent handling apparatus and method
US-10598133-B2 · Mar 24, 2020 · US
Accumulator
US-2020003233-A1 · Jan 2, 2020 · US
Accumulator
US-2019360503-A1 · Nov 28, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F15B2201/41?
- CPC F15B2201/41 is the Cooperative Patent Classification code for “Liquid ports.”
- How many patents are filed under CPC F15B2201/41 (Liquid ports)?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC F15B2201/41 growing?
- Publication counts under this code: 2 in 2024 vs 7 in 2025 (latest complete years).