3M Purification Inc. (formerly CUNO) is a world leader in advanced depth filtration systems and membrane-based separations, offering a range of high performance and high quality products to meet a variety of processing challenges facing today's bioprocess industry. 3M Purification's innovative filtration products are used by major biotech companies around the world to produce therapeutics that bring cures to millions of patients everyday. From cell culture clarification, to soluble impurity removal, to final sterilizing filtration, 3M Purification technologies deliver an economical, robust solution for your processing needs.