System and method for treating ambient air
US-10618002-B2 · Apr 14, 2020 · US
controlling filtration
controlling filtration · 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 | B01D46/44 |
| Official title | controlling filtration |
| Display label | controlling filtration |
| Total patents | 271 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 9 |
| 2017 | 19 |
| 2018 | 12 |
| 2019 | 14 |
| 2020 | 22 |
| 2021 | 48 |
| 2022 | 47 |
| 2023 | 32 |
| 2024 | 36 |
| 2025 | 23 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods and apparatuses for detecting parameter for air purifier
US-10518208-B2 · Dec 31, 2019 · US
Air filtration ceiling fan
US-2019323524-A1 · Oct 24, 2019 · US
Low noise, ceiling mounted indoor air scrubber
US-2019299154-A1 · Oct 3, 2019 · US
Indoor unit for air conditioner
US-2019275455-A1 · Sep 12, 2019 · US
Combining model and delta pressure based soot load estimates
US-10392998-B2 · Aug 27, 2019 · US
Air cleaner
US-2019184324-A1 · Jun 20, 2019 · US
Ventilating device
US-2019160412-A1 · May 30, 2019 · US
Air cleaner
US-2019125917-A1 · May 2, 2019 · US
System and method for treating ambient air
US-2019118140-A1 · Apr 25, 2019 · US
Method and device for calculating consumed lifespan
US-10247654-B2 · Apr 2, 2019 · US
Air filter assembly
US-10239007-B2 · Mar 26, 2019 · US
Filter for a portable industrial air filtration device
US-10226729-B2 · Mar 12, 2019 · US
System, method and computer program product for air filter management
US-2019041079-A1 · Feb 7, 2019 · US
Sensor, filter element comprising a sensor and use of said type of filter element
US-10189701-B2 · Jan 29, 2019 · US
Air filtration for a mobile mining machine
US-2018318743-A1 · Nov 8, 2018 · US
Method and apparatus for determining information concerning a particle load in an airflow flowing into a vehicle interior
US-2018272831-A1 · Sep 27, 2018 · US
Air filter assembly
US-10080988-B2 · Sep 25, 2018 · US
Air purifying device
US-2018257018-A1 · Sep 13, 2018 · US
Air conditioner and control method therefor
US-2018250622-A1 · Sep 6, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D46/44?
- CPC B01D46/44 is the Cooperative Patent Classification code for “controlling filtration.”
- How many patents are filed under CPC B01D46/44 (controlling filtration)?
- Our database includes 271 publications tagged with this CPC code.
- Is patent activity under CPC B01D46/44 growing?
- Publication counts under this code: 36 in 2024 vs 23 in 2025 (latest complete years).