Smart multi-modal vehicular air filtering system and associated methods
US-2018345762-A1 · Dec 6, 2018 · US
by measuring the concentration of particles
by measuring the concentration of particles · 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 | B01D46/442 |
| Official title | {by measuring the concentration of particles} |
| Display label | by measuring the concentration of particles |
| Total patents | 371 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 13 |
| 2017 | 30 |
| 2018 | 23 |
| 2019 | 25 |
| 2020 | 50 |
| 2021 | 49 |
| 2022 | 47 |
| 2023 | 47 |
| 2024 | 34 |
| 2025 | 36 |
| 2026 | 10 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Air cleaning system and method of controlling the same
US-10092873-B2 · Oct 9, 2018 · US
System and method for maintaining, monitoring and/or improving air quality and purity in at least one room or environment
US-2018264391-A1 · Sep 20, 2018 · US
Air purifying device
US-2018257018-A1 · Sep 13, 2018 · US
Particulate matter sensor with engineered particle size cut-point
US-2018245499-A1 · Aug 30, 2018 · US
Air purifying system and a method of using the same
US-10054572-B2 · Aug 21, 2018 · US
Medical/surgical waste collection portable rover capable of zero setting a float used to measure the volume of liquid in a waste container
US-2018221804-A1 · Aug 9, 2018 · US
System, method and computer program product for an air quality amelioration action
US-2018186212-A1 · Jul 5, 2018 · US
System and method for condition-based monitoring of turbine filters
US-2018073386-A1 · Mar 15, 2018 · US
Fine particle detector and exhaust gas purification apparatus
US-2018008925-A1 · Jan 11, 2018 · US
Exhaust gas analysis system, recording medium recorded with program for exhaust gas analysis system, and exhaust gas analyzing method
US-2017343462-A1 · Nov 30, 2017 · US
Air cleaner and method for controlling an air cleaner
US-9821262-B2 · Nov 21, 2017 · US
Parallel air filtration
US-2017328590-A1 · Nov 16, 2017 · US
Filter replacement lifetime prediction
US-9797812-B2 · Oct 24, 2017 · US
Filter replacement lifetime prediction
US-2017284927-A1 · Oct 5, 2017 · US
Air conditioner and control method therefor
US-2017284694-A1 · Oct 5, 2017 · US
Automatic database filtering system utilizing robotic filters
US-2017261979-A1 · Sep 14, 2017 · US
Automatic database filtering system utilizing robotic filters
US-2017261976-A1 · Sep 14, 2017 · US
Air filter configured in a roll
US-2017246583-A1 · Aug 31, 2017 · US
Air cleaner
US-2017246579-A1 · Aug 31, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D46/442?
- CPC B01D46/442 is the Cooperative Patent Classification code for “by measuring the concentration of particles.”
- How many patents are filed under CPC B01D46/442 (by measuring the concentration of particles)?
- Our database includes 371 publications tagged with this CPC code.
- Is patent activity under CPC B01D46/442 growing?
- Publication counts under this code: 34 in 2024 vs 36 in 2025 (latest complete years).