Liquid bath air filter
US-12576358-B2 · Mar 17, 2026 · US
by bubbling the gas through a liquid bath
by bubbling the gas through a liquid bath · 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 | B01D47/021 |
| Official title | {by bubbling the gas through a liquid bath} |
| Display label | by bubbling the gas through a liquid bath |
| Total patents | 57 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 3 |
| 2018 | 6 |
| 2019 | 6 |
| 2020 | 2 |
| 2021 | 8 |
| 2022 | 4 |
| 2023 | 11 |
| 2024 | 7 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fluidized bed separation method and device for methanol-to-olefins quenched water
US-12466753-B2 · Nov 11, 2025 · US
Dual wash method for forming cooled gas
US-2025269314-A1 · Aug 28, 2025 · US
System and method of producing cooled dry gas
US-12268982-B2 · Apr 8, 2025 · US
Particle-collecting device and vehicle equipped with such a device
US-12172120-B2 · Dec 24, 2024 · US
Separating carbon dioxide and hydrogen from a multicomponent gaseous stream
US-2024350965-A1 · Oct 24, 2024 · US
Biosensor and virusometer for the detection of pathogens in air and liquid samples
US-2024319187-A1 · Sep 26, 2024 · US
Liquid bath air filter
US-2024198271-A1 · Jun 20, 2024 · US
Waste gas abatement technology for semiconductor processing
US-11931682-B2 · Mar 19, 2024 · US
Device for removing biomaterial
US-11925897-B2 · Mar 12, 2024 · US
Portable breathing air filtering device and method
US-2024058738-A1 · Feb 22, 2024 · US
Fluidized bed separation method and device for methanol-to-olefins quenched water
US-2023365449-A1 · Nov 16, 2023 · US
Liquid filter apparatus for gas/solid separation for semiconductor processes
US-11786858-B2 · Oct 17, 2023 · US
Methods of conducting an environmental test
US-11726021-B1 · Aug 15, 2023 · US
Autothermal direct air capture system
US-2023158451-A1 · May 25, 2023 · US
System and method of producing cooled dry gas
US-2023134370-A1 · May 4, 2023 · US
Environmental sampling chamber
US-11624696-B1 · Apr 11, 2023 · US
Multiple stage air purification device
US-2023083217-A1 · Mar 16, 2023 · US
Air flow vessel and spray ring air purification device
US-11573018-B2 · Feb 7, 2023 · US
Gasification system and wastewater treatment method
US-2023035152-A1 · Feb 2, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D47/021?
- CPC B01D47/021 is the Cooperative Patent Classification code for “by bubbling the gas through a liquid bath.”
- How many patents are filed under CPC B01D47/021 (by bubbling the gas through a liquid bath)?
- Our database includes 57 publications tagged with this CPC code.
- Is patent activity under CPC B01D47/021 growing?
- Publication counts under this code: 7 in 2024 vs 3 in 2025 (latest complete years).