Back to results
US 2022/0016453 A1Published application
Antiviral face masks and air filters
AssigneeCalgon Carbon Corporation
InventorsRobert BROWN, Paul CURTIS
Life of this patent
Estimating the term…
Abstract
Air filters and masks containing activated carbon cloth material, optionally with silver included, are described that are effective at removing virus from the air, immobilizing, and inactivating. The filters and masks can immobilize and inactivate a virus. The filters and masks are useful for protecting a user against coronavirus such as SARS-CoV-2.
Claims20
A method of filtering an air stream that contains a virus or which is suspected of containing a virus comprising:
- passing an input air stream from an inlet face through a layered composite to an output face and thereby producing an output air stream having a virus concentration that is less than the virus concentration in the input air stream, wherein the layered composite comprises:
- an inner layer oriented towards or constitutes the inlet face;
- at least one layer of activated carbon cloth adjacent to the inner layer, and
- an outer layer comprising a non-woven polymer, the outer layer oriented towards or constitutes the outlet face and adjacent to the at least one layer of the activated carbon cloth, wherein the layered composite is contained within a filter or a face mask.
1 more element
A layered composite for the removal of a virus from an air stream comprising:
- an inner layer oriented towards or constitutes the inlet face;
- at least one layer of activated carbon cloth adjacent to the inner layer, and
- an outer layer comprising a non-woven polymer, the outer layer oriented towards or constitutes the outlet face and adjacent to the at least one layer of the activated carbon cloth, wherein the layered composite is contained within a filter or a face mask.
Dependencies are inferred from the claim text.