Disclosed is a disposable dialysis cassette which is flat, flexible, self-closing and applicable to solutions containing proteins, DNA, RNA, or other molecules. The dialysis cassette embodies a first and second semi-permeable dialysis membrane, or tubular dialysis membrane, sealed by a flexible frame...http://www.google.fr/patents/US6531061?utm_source=gb-gplus-shareBrevet US6531061 - Disposable dialysis cassette