A U.S. Patent for “Protein Separations Using an Acrylamide Containing Filter” was awarded to MilliporeSigma on February 25th, 2020. The present invention is a method of improving the filtration capacity of a virus filter during purification of a protein of interest, comprising subjecting a sample comprising said protein of interest to a prefiltration step prior to passing through said virus filter, said prefiltration step comprising contacting said sample with a porous solid support selected from the group consisting of chromatographic resin, a membrane, a porous bead, a porous monolith, a winged fiber, a woven fabric and a non-woven fabric… Learn More