Patent ID: 8167145

Claim:
A method of making a granular media water filter, the method comprising: providing only a first component and a second component, the first component being binder particles of 100-500 U.S. mesh size and having melt index of less than or equal to 1 g/10 min, and the second component being particles of material active for fluid treatment of 100-500 U.S. mesh size; and providing no particles larger than the particles of the first component and the particles of the second component; mixing together only said first component and said second component; heating the resulting mixture to a temperature in the range of about 275-500 degrees F. to soften said binder particles so that the particles of the second component adhere to the binder particles to form a plurality of un-sized granules; sizing the un-sized granules to obtain a plurality of separate granules in the range of 75 microns up to about 4700 microns; cooling said plurality of separate granules after said sizing; and loading said plurality of separate granules into a filter vessel for use in filtering fluid; wherein the method further comprises compression of said mixture when the mixture temperature is above the binder's softening point and prior to said sizing.