Patent ID: 7074313

Claim:
A device for accommodating at least one substance with respect to an external fluid environment at least during a predetermined process, said device comprising an impermeable inner member defining a chamber adapted for accommodating therein said at least one substance, said inner member having at least one inlet opening such as to provide open communication between said chamber and an outside of the device, said inlet opening being of a size sufficient to permit said at least one substance to be selectively inserted and removed from said chamber, said inlet opening being bound on all sides by said inner member, said inner member further including at least one first portal and at least one second portal each separate from said at least one inlet opening, said device further comprising semipermeable membrane means associated with said at least one first portal and said at least one second portal, said semipermeable membrane means being sealingly fixed on an outside surface of said inner member such that fluid communication between said chamber and said external fluid environment via at least one first portal and at least one second portal is through said membrane means.