Filigent - more infoHere is an extract from documentation found on their site at https://www.filligent.net/public/index.php
***
The BioMask™ is based on an “intelligent filtration” technology and is fabricated from a scientifically designed and tested multilayer material which has in its internal structure a unique active layer which has highly targeted anti-microbial properties. This active layer aggressively detects, traps, and then rapidly kills pathogens, within minutes of contact.
This patented BioFriend™ textile layer CAPTURES pathogens by mimicking the sites on human cells to which they normally attach, then quickly DESTROYS them by disrupting their surfaces (viruses) and cell walls (bacteria). Many viruses, including influenza viruses, are known to bind to a terminal sialic acid residue on the surface of the human cell membrane. The binding agent in the BioFriend™ textile mimics the binding action of sialic acid on influenza viruses.
***
I could not find in there that the pasl was pattented but it would rather be built with the pattented Biofriend layer. If you read throughout they have the patent since 2008