Humidification and purification apparatus
US-12553623-B2 · Feb 17, 2026 · US
using wet filter elements
using wet filter elements · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F24F8/125 |
| Official title | using wet filter elements |
| Display label | using wet filter elements |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 4 |
| 2017 | 4 |
| 2018 | 2 |
| 2019 | 8 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 2 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Air purification device
US-2026041807-A1 · Feb 12, 2026 · US
Multi-functional equipment for direct decarbonization with improved indoor air quality
US-12480672-B2 · Nov 25, 2025 · US
HVAC System Air Filter
US-2025235817-A1 · Jul 24, 2025 · US
Air conditioner
US-2025155144-A1 · May 15, 2025 · US
HVAC system air filter
US-12268988-B2 · Apr 8, 2025 · US
Hvac system air filter
US-2024139674-A1 · May 2, 2024 · US
Humidification and purification apparatus
US-2024053033-A1 · Feb 15, 2024 · US
Air treatment apparatus
US-2023400204-A1 · Dec 14, 2023 · US
Multi-functional equipment for direct decarbonization with improved indoor air quality
US-2023125924-A1 · Apr 27, 2023 · US
Air purifier
US-11592198-B2 · Feb 28, 2023 · US
Humidification and air cleaning apparatus
US-11572893-B2 · Feb 7, 2023 · US
Capture device for purifying air, purification device and air purifier
US-11439934-B2 · Sep 13, 2022 · US
Multifunctional circulation system enabling purification of outside air
US-11320158-B2 · May 3, 2022 · US
Air purifier
US-11306931-B2 · Apr 19, 2022 · US
Hvac system air filter
US-2022047988-A1 · Feb 17, 2022 · US
Humidification and air cleaning apparatus
US-2021372640-A1 · Dec 2, 2021 · US
HVAC system air filter
US-11161074-B2 · Nov 2, 2021 · US
Humidification and air cleaning apparatus
US-2021172456-A1 · Jun 10, 2021 · US
Capture Device for Purifying Air, Purification Device and Air Purifier
US-2021129062-A1 · May 6, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F24F8/125?
- CPC F24F8/125 is the Cooperative Patent Classification code for “using wet filter elements.”
- How many patents are filed under CPC F24F8/125 (using wet filter elements)?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC F24F8/125 growing?
- Publication counts under this code: 2 in 2024 vs 4 in 2025 (latest complete years).