Air purifying apparatus and air purifying method
US-11285418-B2 · Mar 29, 2022 · US
Operations & Transport
Operations & Transport · 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 | B01D50/004 |
| Official title | — |
| Display label | Operations & Transport (mapped technology topic) |
| 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 | 1 |
| 2016 | 3 |
| 2017 | 8 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and methods for dry fog inlet particle separator
US-11261788-B2 · Mar 1, 2022 · US
Controlling flow of black powder in hydrocarbon pipelines
US-11241698-B2 · Feb 8, 2022 · US
Controlling flow of black powder in hydrocarbon pipelines
US-11235338-B2 · Feb 1, 2022 · US
Particulate matter collecting apparatus
US-2021322917-A1 · Oct 21, 2021 · US
Purification Device for Air Purification and Air Purifier Having Same
US-2021146288-A1 · May 20, 2021 · US
Controlling flow of black powder in hydrocarbon pipelines
US-11007536-B2 · May 18, 2021 · US
Capture Device for Purifying Air, Purification Device and Air Purifier
US-2021129062-A1 · May 6, 2021 · US
Cyclone for air cleaning and filtering module having the same
US-10933364-B2 · Mar 2, 2021 · US
Wet type dust collector using electrospray and vortex
US-10888813-B2 · Jan 12, 2021 · US
Controlling flow of black powder in hydrocarbon pipelines
US-2020360933-A1 · Nov 19, 2020 · US
Controlling flow of black powder in hydrocarbon pipelines
US-2020360934-A1 · Nov 19, 2020 · US
Controlling flow of black powder in hydrocarbon pipelines
US-2020360932-A1 · Nov 19, 2020 · US
Systems and methods for dry fog inlet particle separator
US-2020291855-A1 · Sep 17, 2020 · US
Controlling flow of black powder in hydrocarbon pipelines
US-10744514-B2 · Aug 18, 2020 · US
Display device
US-10481063-B2 · Nov 19, 2019 · US
Wet type dust collector using electrospray and vortex
US-2019336904-A1 · Nov 7, 2019 · US
Centrifugal abatement separator
US-10464002-B2 · Nov 5, 2019 · US
Discrete extract collection system for co2-based fluid extraction
US-2019282923-A1 · Sep 19, 2019 · US
Wet cyclone apparatus
US-2019283046-A1 · Sep 19, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D50/004?
- CPC B01D50/004 is the Cooperative Patent Classification code for “Operations & Transport.”
- How many patents are filed under CPC B01D50/004 (Operations & Transport)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC B01D50/004 growing?
- Publication counts under this code: 6 in 2021 vs 4 in 2022 (latest complete years).