Air filtering system
US-2025025891-A1 · Jan 23, 2025 · US
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Emergency control systems
Emergency control systems · 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 | B03C3/72 |
| Official title | Emergency control systems |
| Display label | Emergency control systems |
| Total patents | 8 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 2 |
| 2020 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electronic air cleaners and associated systems and methods
US-10668483-B2 · Jun 2, 2020 · US
Detection of electrostatic filter for air filtration system
US-9579663-B2 · Feb 28, 2017 · US
Electronic air cleaners and associated systems and methods
US-2017021363-A1 · Jan 26, 2017 · US
Electronic air cleaners and associated systems and methods
US-9488382-B2 · Nov 8, 2016 · US
Air purification device
US-9468937-B2 · Oct 18, 2016 · US
Electronic air cleaners and associated systems and methods
US-2015323217-A1 · Nov 12, 2015 · US
Air purification device
US-2015224516-A1 · Aug 13, 2015 · US