US 12,076,671 B2
Filter arrangement including prefiltration filter element and filter device
Timothy J. Wilkinson, Fareham (GB)
Assigned to CYTIVA US LLC, Marlborough, MA (US)
Filed by CYTIVA US LLC, Marlborough, MA (US)
Filed on Jun. 23, 2020, as Appl. No. 16/909,239.
Prior Publication US 2021/0394094 A1, Dec. 23, 2021
Int. Cl. B01D 35/04 (2006.01); B05B 15/40 (2018.01); B05B 1/18 (2006.01); E03C 1/04 (2006.01)
CPC B01D 35/04 (2013.01) [B05B 15/40 (2018.02); B05B 1/18 (2013.01); E03C 1/0404 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A filter device comprising a point of use shower head device or a point of use faucet head device comprising a housing having an inlet and an outlet and defining a fluid flow path between the inlet and the outlet, and a filter arrangement comprising a host filter comprising a sterilizing grade water filter comprising (a) a hollow cylindrical porous host filter element having a first end and a second end; (b) a first end cap arranged at the first end or the second end of the hollow cylindrical porous host filter element, the first end cap having an outer diameter; and, (c) an outer surface; and, (d) a porous fibrous hollow cylindrical prefiltration element compression fit on the outer diameter of the first end cap, and covering exposed outer surface of the host filter, wherein the filter arrangement is arranged across the fluid flow path.