Porous separator media

Claim 1

A FILTER MEDIA FOR RAPIDLY FREEING A HYDROCARBON LIQUID FROM WATER MECHANICALLY CONTAINED THEREIN, COMPRISING A POROUS WATER REPELLENT SHEET FORMED OF INTERFELTED RANDOMLY ORIENTED ESPARTO FIBERS FROM 8 TO 12 MICRONS IN DIAMETER SO THAT THESE FIBERS AS THEY LAY IN THE SHEET ARE SUBSTANTIALLY UNIFORM AS TO LENGTH AND DIAMETER AND CARRYING A WATER REPELLENT CHEMICAL SO THAT THE SHEET WILL PASS THE HYDROCARBON LIQUID BUT BLOCK THE WATER AT THE UPSTREAM SURFACE OF THE SHEET, AND HAVING A MAXIUM PORE SIZE SUCH THAT ITS BUBBLE PRESSURE RATING IS P AND ITS FRAZIER AIR PERMEABILITY IS F, WHEREIN P IS THE BUBBLE PRESSURE OF THE SHEET MEASURED IN INCHES OR WATE AND IS 7 OR MORE AND F IS THE C.F.M. FLOW OF AIR PER SQUARE FOOT PER 0.5 INCH OF WATER DIFFERENTIAL PRESSURE, AND PXF GIVES A SEPARATION VELOCITY NUMBER OF 240 OR MORE; AND WHEREIN SAID SHEET IS CAPABLE OF REMOVING ALL OF THE WATER FROM A MIXTURE CONTAINING 1% OF WATER IN A HIGH FLASH-POINT KEROSENE TYPE OF FUEL HAVING A SURFACE TENSION OF THE ORDER OF 26.0 DYNES PER CENTIMETER, A SPECIFIC GRAVITY OF THE ORDER OF .788 AT 60*F. AND A VISCOSITY OF THE ORDER OF 2 CENTISTOKES AT 80*F., AND AT A FLOW RATE IN EXCESS OF 20 G.P.M. PER SQUARE FOOT.