Carbon dioxide recovery system
US-2025381512-A1 · Dec 18, 2025 · US
for treating air sourced from urban areas, e.g. from streets
for treating air sourced from urban areas, e.g. from streets · 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 | F24F8/99 |
| Official title | for treating air sourced from urban areas, e.g. from streets |
| Display label | for treating air sourced from urban areas, e.g. from streets |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2017 | 7 |
| 2018 | 1 |
| 2019 | 6 |
| 2020 | 7 |
| 2021 | 7 |
| 2022 | 6 |
| 2023 | 4 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Outside air purification system for a vehicle and a method of controlling the same
US-2025237397-A1 · Jul 24, 2025 · US
Outdoor air cleaning system
US-12055320-B2 · Aug 6, 2024 · US
Filter device, air conducting hose with filter element, tunnel, and use of the filter device
US-11958009-B2 · Apr 16, 2024 · US
Flow grid and ambient air purification device
US-2023294029-A1 · Sep 21, 2023 · US
Uniformly expandable air filter
US-11642617-B2 · May 9, 2023 · US
Road vehicle having an ambient air purification device, ambient air purification device and filter element
US-11634011-B2 · Apr 25, 2023 · US
Cyclonic vehicular traffic pollution control system
US-11571644-B2 · Feb 7, 2023 · US
Air filter system and HVAC system
US-11493216-B2 · Nov 8, 2022 · US
System and method for measuring a concentration of a pollutant within a gas
US-11280705-B2 · Mar 22, 2022 · US
Cyclonic vehicular traffic pollution control system
US-2022072458-A1 · Mar 10, 2022 · US
Uniformly expandable air filter
US-2022054968-A1 · Feb 24, 2022 · US
Electrostatic precipitator integrated with double-skin facade of building
US-11253871-B2 · Feb 22, 2022 · US
Titanium oxide-comprising fibrous filter material
US-11213777-B2 · Jan 4, 2022 · US
Uniformly expandable air filter
US-11192059-B2 · Dec 7, 2021 · US
Filter
US-11117140-B2 · Sep 14, 2021 · US
Filter Device, Air Conducting Hose with Filter Element, Tunnel, and Use of the Filter Device
US-2021275953-A1 · Sep 9, 2021 · US
Environmental air cleaning device, road vehicle having environmental air cleaning device, and filter element
US-11065942-B2 · Jul 20, 2021 · US
Fresh air purification window for anti-haze
US-11054159-B2 · Jul 6, 2021 · US
Outdoor air cleaning system
US-2021172631-A1 · Jun 10, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F24F8/99?
- CPC F24F8/99 is the Cooperative Patent Classification code for “for treating air sourced from urban areas, e.g. from streets.”
- How many patents are filed under CPC F24F8/99 (for treating air sourced from urban areas, e.g. from streets)?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC F24F8/99 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).