Patent ID: 11857001
Assignee: SINTX TECHNOLOGIES, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC A  B  C  D | IPC A  D

Claim 5:
6. An antiviral face mask comprising:
a face mask body; and
one or more filters in the face mask body, each of the one or more filters comprising:
a fibrous material layer comprising silicon nitride powder impregnated in the fibrous material layer, wherein the silicon nitride is present at a concentration of about 1 wt. % to about 15 wt. %, wherein the powder has an average particle size of 0.6 μm to 5 μm;
wherein the silicon nitride inactivates a human virus in contact with the one or more filters of the antiviral face mask,
wherein the virus is not SARS-CoV-2.