Patent ID: 7650805
Filing Date: 2010-01-26
Classification: B01D

Abstract:
1. A filtration device having two or more layers of filtration material, wherein each layer of the two or more layers of filtration material is capable of being independently tested for integrity, the device comprising a porous core having a closed end and an outlet at the other end, a first layer of filtration material arranged concentrically outward from the core and at least one additional layer of filtration material arranged concentrically outward from the first layer forming a space between the first and at least one additional layer, an outer porous cover layer concentrically arranged around the at least one additional layer, the core, the cover layer and first and at least one additional layer all being liquid tightly sealed together, a port arranged in the space between the first and at least one additional layer, the port being in fluid communication with the space and outside of the device.