20100147763 | MODIFIED POROUS MEMBRANES, METHODS OF MEMBRANE PORE MODIFICATION, AND METHODS OF USE THEREOF - The present invention describes a method of modifying pores of a porous membrane, comprising contacting the membrane with a pore modifying agent, wherein the pore modifying agent modifies the pore opening at the first surface of the membrane differently than the pore opening at the second surface of the membrane. The invention also describes a porous membrane having a first surface and a second surface, comprising a plurality of pores extending between the first and second surfaces, wherein the pores have been modified by a pore modifying agent such that the pore opening at one membrane surfaces is distinct from the pore opening of the other membrane surface, or the pore shape is distinct at one or more locations between the first and second surfaces. | 06-17-2010 |