Patent ID: 6565749
Filing Date: 2003-05-20
Classification: A61L,C02F

Abstract:
A filter for removing microorganisms from a liquid, comprising:a filtration media comprising a substrate having a reactive surface and at least a first and second cationic polymer bonded to the reactive surface of said substrate, each of said cationic polymers including a plurality of cationic groups so that said filtration media has a cationic charge for attracting microorganisms in a liquid, wherein said first and second cationic polymers are mixed prior to bonding to said reactive surface; wherein said first cationic polymer is a polyamide-polyamine polymer having the following repeating units; wherein n is between about 10 and about 100,000; and wherein said second cationic polymer is at least one of a polyamine polymer having the following repeating units: wherein n is between about 10 and about 100,000 and a polyamide-polyamine polymer having the following repeating units: wherein n is between about 10 and about 100,000.