Patent ID: 8932381
Filing Date: 2015-01-13
Classification: B01D,B22F,Y10T

Abstract:
1. A porous membrane, comprising a blend of a first powder of metal particles of a first average size and a second powder of metal particles of a second average size, the first powder and the second powder sintered together, wherein the first average size is five to fifty times greater than the second average size, and wherein the porous membrane comprises from 40% to 60% by weight of the first powder, wherein the water bubble point of the porous membrane is from 4 to 8 psi, and wherein the porous membrane has a Log Reduction Value (LRV) of 4 or more for 0.1 micron particles in a gas having velocity of 3 slpm/cm wherein the first average size is from about 40 microns to about 60 microns, and the second average size is not greater than about 2 microns.