Water filtration device for aircraft galley plumbing system
US-2021387118-A1 · Dec 16, 2021 · US
Single-way valves
Single-way valves · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D2201/167 |
| Official title | Single-way valves |
| Display label | Single-way valves |
| Total patents | 120 |
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 | 3 |
| 2017 | 11 |
| 2018 | 9 |
| 2019 | 13 |
| 2020 | 17 |
| 2021 | 8 |
| 2022 | 19 |
| 2023 | 10 |
| 2024 | 14 |
| 2025 | 10 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Filter system for a wind turbine, a wind turbine having a filter system and method for changing an oil filter of a filter system
US-2021332878-A1 · Oct 28, 2021 · US
Fuel filter assembly
US-2021299597-A1 · Sep 30, 2021 · US
Fuel filter assembly
US-2021299598-A1 · Sep 30, 2021 · US
Filter device
US-11052336-B2 · Jul 6, 2021 · US
Water purifier
US-10864468-B2 · Dec 15, 2020 · US
Water Filtration Device for Aircraft Galley Plumbing System
US-2020360842-A1 · Nov 19, 2020 · US
Filter system and method
US-2020360840-A1 · Nov 19, 2020 · US
Check valves
US-2020332908-A1 · Oct 22, 2020 · US
Trv shutoff valve
US-2020325864-A1 · Oct 15, 2020 · US
Check valve
US-10753492-B2 · Aug 25, 2020 · US
Pressure relief cover assembly
US-2020256515-A1 · Aug 13, 2020 · US
Liquid filter arrangements and methods
US-2020238205-A1 · Jul 30, 2020 · US
Check valves
US-10724647-B2 · Jul 28, 2020 · US
Filter device
US-2020230529-A1 · Jul 23, 2020 · US
Filter device
US-2020230533-A1 · Jul 23, 2020 · US
Oil housing, filter element, and valving assembly for providing pre-charged oil volume changes
US-2020191028-A1 · Jun 18, 2020 · US
Filter device
US-2020188822-A1 · Jun 18, 2020 · US
Automatic filter cleaning apparatus, automatic filter cleaning method using the same, and supercritical fluid power generation system including the same
US-10668412-B2 · Jun 2, 2020 · US
Aseptic filter vent valve and port for integrity testing
US-10656046-B2 · May 19, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2201/167?
- CPC B01D2201/167 is the Cooperative Patent Classification code for “Single-way valves.”
- How many patents are filed under CPC B01D2201/167 (Single-way valves)?
- Our database includes 120 publications tagged with this CPC code.
- Is patent activity under CPC B01D2201/167 growing?
- Publication counts under this code: 14 in 2024 vs 10 in 2025 (latest complete years).