Patent ID: 11930867
Assignee: FXI INC. LIMITED
Field: Chemical engineering (Chemistry)
Classification: CPC A  D  B | IPC A  D

Claim 0:
1. A filter for reducing transmission of a virus therethrough, the filter comprising:
a coated substrate comprising:
a non-woven fabric having a weight from about 15 g/m2 to about 120 g/m2 according to ASTM D3776;
mineral oxide particles coated on the non-woven fabric and derived from a solution or suspension comprising about 0.5 wt % to about 5 wt % mineral oxide particles; and
iron oxide particles coated on the non-woven fabric and derived from a solution or suspension comprising about 0.5 wt % to about 5 wt % iron oxide particles, wherein the mineral oxide particles, the iron oxide particles, or both are functionalized with an organic functional group, wherein the mineral oxide particles are different from the iron oxide particles, and wherein about 90% or more of aspirated virus-sized particles are prevented from transmitting through the filter.