Method for checking the state of a hydraulic accumulator
US-2025320882-A1 · Oct 16, 2025 · US
the flexible separating means being bladders
the flexible separating means being bladders · 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 | F15B2201/3152 |
| Official title | the flexible separating means being bladders |
| Display label | the flexible separating means being bladders |
| Total patents | 41 |
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 | 3 |
| 2016 | 5 |
| 2017 | 4 |
| 2018 | 5 |
| 2020 | 9 |
| 2021 | 6 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Accumulator for a chassis-level cooling system
US-2025159840-A1 · May 15, 2025 · US
Medical fluid therapy machine including pneumatic pump box and accumulators therefore
US-2024200546-A1 · Jun 20, 2024 · US
Hydraulic Accumulator
US-2024110580-A1 · Apr 4, 2024 · US
Medical fluid therapy machine including pneumatic pump box and accumulators therefore
US-11946466-B2 · Apr 2, 2024 · US
Accumulator for a chassis-level cooling system
US-2023262928-A1 · Aug 17, 2023 · US
Pressure compensation device designed for underwater applications
US-11674529-B2 · Jun 13, 2023 · US
Accumulator with flexible inflatable container
US-11359648-B2 · Jun 14, 2022 · US
High-capacity bladder type constant pressure accumulator and application thereof
US-2022178388-A1 · Jun 9, 2022 · US
Equalization device, in particular in the form of a tank
US-11168706-B2 · Nov 9, 2021 · US
Hydraulic energy recovery apparatus for working machine
US-11149753-B2 · Oct 19, 2021 · US
Gas-liquid Coupling Type Fluid Pulsation Attenuator
US-2021293257-A1 · Sep 23, 2021 · US
Accumulator pre-charge determination
US-11118605-B1 · Sep 14, 2021 · US
Hydraulic Energy Recovery Apparatus for Working Machine
US-2021131452-A1 · May 6, 2021 · US
Bootstrap hydraulic reservoir
US-10920795-B2 · Feb 16, 2021 · US
Accumulator With Flexible Inflatable Container
US-2020378410-A1 · Dec 3, 2020 · US
Epichlorohydrin rubber composition, crosslinked epichlorohydrin rubber object, and diaphragm and bladder for accumulator
US-2020247990-A1 · Aug 6, 2020 · US
Hydraulic Actuator
US-2020224683-A1 · Jul 16, 2020 · US
Bootstrap hydraulic reservoir
US-2020166055-A1 · May 28, 2020 · US
Pressure Compensation Device Designed for Underwater Applications
US-2020166056-A1 · May 28, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F15B2201/3152?
- CPC F15B2201/3152 is the Cooperative Patent Classification code for “the flexible separating means being bladders.”
- How many patents are filed under CPC F15B2201/3152 (the flexible separating means being bladders)?
- Our database includes 41 publications tagged with this CPC code.
- Is patent activity under CPC F15B2201/3152 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).