Abstract: An air filtration membrane includes a substrate and a network of electrospun polymeric nanofibers deposited on the substrate, wherein the air filtration membrane has a minimum air filtration efficiency of between MERV 13 and HEPA filtration. One or more layers of the air filtration membrane can include applied antimicrobial nanoparticles.

Abstract: A portable bottle for filtering drinking water is disclosed that includes a bottle having a threaded opening, a cover for cooperating with the threaded opening of the bottle and including a top wall having a plurality of internal engagement lugs depending downwardly from an interior surface of the top wall, a filter cartridge including an end cap having a circumferential side wall that includes a plurality of engagement ribs for cooperating with the engagement lugs of the cover, and a spout including a compressible circumferential flange configured to be positioned between the interior surface of the top wall of the cover and the upper surface the end cap of the filter cartridge to provide a resilient biasing force therebetween.

Abstract: An apparatus for filtering and dispensing drinking water is disclosed which includes a container having an interior space with a dividing wall defining a first chamber for receiving unfiltered water and a second chamber for storing filtered drinking water, wherein a passage is formed through the interior wall adjacent a bottom surface of the container to provide fluid communication between the first and second chambers, and wherein at least one multi-layered filter pack is disposed across the passage to filter water flowing from the first chamber to the second chamber under force of gravity.

Abstract: A multi-layered pleated filter element for filtering drinking water is disclosed which includes at least one upstream glass fiber layer for pre-filtration, a nanofiber membrane layer for bacteria retention, and at least one downstream positively charged microporous membrane layer for virus retention.

Abstract: A portable bottle for filtering drinking water is disclosed that includes a bottle having a threaded opening, a cover for cooperating with the threaded opening of the bottle and including a top wall having a plurality of internal engagement lugs depending downwardly from an interior surface of the top wall, a filter cartridge including an end cap having a circumferential side wall that includes a plurality of engagement ribs for cooperating with the engagement lugs of the cover, and a spout including a compressible circumferential flange configured to be positioned between the interior surface of the top wall of the cover and the upper surface the end cap of the filter cartridge to provide a resilient biasing force therebetween.