Exhaust fan for preventing air pollution
US-12485376-B2 · Dec 2, 2025 · US
Post-treatment of gases
Post-treatment of gases · 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 | B03C3/019 |
| Official title | Post-treatment of gases |
| Display label | Post-treatment of gases |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 7 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 6 |
| 2023 | 9 |
| 2024 | 6 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Air cleaning module and air cleaning device
US-2025229206-A1 · Jul 17, 2025 · US
Electrostatic precipitator and additive manufacturing apparatus
US-12350685-B2 · Jul 8, 2025 · US
Systems and methods for precleaning air using charge plates
US-2025128270-A1 · Apr 24, 2025 · US
Filter unit for air cleaning device, and air cleaning device
US-12274979-B2 · Apr 15, 2025 · US
Electrostatic filter unit for an air cleaning device and air cleaning device
US-12251712-B2 · Mar 18, 2025 · US
Air filter and vehicle air conditioner equipped therewith
US-2025026182-A1 · Jan 23, 2025 · US
Flue pipe systems and methods of purifying flue gases
US-12097509-B2 · Sep 24, 2024 · US
Indoor unit for air conditioner
US-11940179-B2 · Mar 26, 2024 · US
Method to check a coffee beans roasting system
US-2024065307-A1 · Feb 29, 2024 · US
Method to roast coffee beans
US-2024032559-A1 · Feb 1, 2024 · US
Method to roast coffee beans
US-2024032560-A1 · Feb 1, 2024 · US
Particle matter analysis device, analysis method and manufacturing method thereof
US-11885729-B2 · Jan 30, 2024 · US
Exhaust fan for preventing air pollution
US-2023233976-A1 · Jul 27, 2023 · US
Air purifying system
US-2023201768-A1 · Jun 29, 2023 · US
Flue pipe systems and methods of purifying flue gases
US-2023173505-A1 · Jun 8, 2023 · US
Ultra low power electrical dust collection apparatus
US-2023158512-A1 · May 25, 2023 · US
Electrostatic precipitating apparatus and air conditioning system having same
US-11654386-B2 · May 23, 2023 · US
Indoor unit for air conditioner
US-2023142796-A1 · May 11, 2023 · US
Particle capturing system and particle capturing method
US-2023084981-A1 · Mar 16, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B03C3/019?
- CPC B03C3/019 is the Cooperative Patent Classification code for “Post-treatment of gases.”
- How many patents are filed under CPC B03C3/019 (Post-treatment of gases)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC B03C3/019 growing?
- Publication counts under this code: 6 in 2024 vs 7 in 2025 (latest complete years).