Patent ID: 11904076
Assignee: AIR SANZ HOLDINGS PTY LTD
Field: Chemical engineering (Chemistry)
Classification: CPC A  B  F | IPC A  B  F

Claim 3:
4. The apparatus of claim 1 wherein the air-filter-surfaces comprise multiple layers of different filter material, and wherein the multiple layers of the air-filter-surfaces comprise a sequence of layers from nearest to the filter interior region to furthest from the filter interior region as follows:
i) a germ-killing filter layer that carries germ-killing-substance;
ii) a germ-killing-substance interception filter layer that intercepts or substantially intercepts the germ-killing-substance; and
iii) a material entrapment layer that entraps at least any filter material that come from said germ-killing filter layer and said germ-killing-substance interception filter layer.