Air filter systems, filter bag assemblies, filter bags and methods
US-12465881-B2 · Nov 11, 2025 · US
Venturi's or systems showing a venturi effect
Venturi's or systems showing a venturi effect · 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 | B01D46/4281 |
| Official title | {Venturi's or systems showing a venturi effect} |
| Display label | Venturi's or systems showing a venturi effect |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 4 |
| 2020 | 7 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 2 |
| 2024 | 6 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Filter unit with flow optimization
US-12343662-B2 · Jul 1, 2025 · US
Filter systems with dirty air chamber spacer elements and methods of using the same
US-2025041781-A1 · Feb 6, 2025 · US
Monitoring devices for air filtration systems
US-2024399280-A1 · Dec 5, 2024 · US
Filter systems with dirty air chamber spacer elements and methods of using the same
US-12134060-B2 · Nov 5, 2024 · US
Air filter systems, filter bag assemblies, filter bags and methods
US-2024115983-A1 · Apr 11, 2024 · US
Filter system and method
US-11938437-B2 · Mar 26, 2024 · US
Monitoring devices for air filtration systems
US-11925890-B2 · Mar 12, 2024 · US
Air filter systems, filter bag assemblies, filter bags and methods
US-11883763-B2 · Jan 30, 2024 · US
Filter systems with dirty air chamber spacer elements and methods of using the same
US-2023372857-A1 · Nov 23, 2023 · US
Filter systems with dirty air chamber spacer elements and methods of using the same
US-11745133-B2 · Sep 5, 2023 · US
Filter unit with flow optimization
US-2022362690-A1 · Nov 17, 2022 · US
Mixer assembly with surrounding filter element, stowage space with mixer assembly, vehicle with a stowage space and method for installing a mixer assembly
US-11492125-B2 · Nov 8, 2022 · US
Flush valve, dust collector and dust collection system
US-11458430-B2 · Oct 4, 2022 · US
Filter system and method
US-2022241713-A1 · Aug 4, 2022 · US
Filter cartridge with venturi nozzle
US-11235271-B2 · Feb 1, 2022 · US
Filter systems with dirty air chamber spacer elements and methods of using the same
US-2021402337-A1 · Dec 30, 2021 · US
Monitoring devices for air filtration systems
US-2021387127-A1 · Dec 16, 2021 · US
Assembly for particle removal
US-11199111-B2 · Dec 14, 2021 · US
Filter systems with dirty air chamber spacer elements and methods of using the same
US-11123671-B2 · Sep 21, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D46/4281?
- CPC B01D46/4281 is the Cooperative Patent Classification code for “Venturi's or systems showing a venturi effect.”
- How many patents are filed under CPC B01D46/4281 (Venturi's or systems showing a venturi effect)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC B01D46/4281 growing?
- Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).