patent number 4897465
Disclosed are ultrafiltration processes for the enrichment and concentration of selected proteins from protein conaining fluids. Illustratively, IgG is concentrated from whey by means of multiple ultrafiltration "passes", using a metallic oxide ultrafiltration membrane, which are characterized by differing pH's.
Abbott Laboratories (Abbott Park, IL)
210/650, 530/412, 530/414