by separation, e.g. by filtering

Introduced: January 2021

Full Title

Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying > by separation, e.g. by filtering

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

IPC defines codes here since 2021.

Child Classifications

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F24F 8/108 using dry filter elements since 2021 IPC+CPC Available in IPC and CPC
F24F 8/117 using wet filtering since 2021 IPC+CPC Available in IPC and CPC
F24F 8/15 by chemical means since 2021 IPC+CPC Available in IPC and CPC
F24F 8/175 using biological materials, plants or microorganisms since 2021 IPC+CPC Available in IPC and CPC
F24F 8/183 by centrifugal separation, e.g. using vortices since 2021 IPC+CPC Available in IPC and CPC
F24F 8/192 by electrical means, e.g. by applying electrostatic fields or high voltages since 2021 +1 CPC IPC+CPC Available in IPC and CPC