Patent ID: 7396461

Claim:
A filter cartridge for a gravity-fed water treatment device, in combination, comprising: (a) a cartridge shell defining an upper portion and an upper interior volume and a lower portion, and a lower interior volume, a top cap, a dome-shaped hydrophilic porous particulate filter carbon block having a dome-shaped closed upper end, and open lower end and sidewalls extending there between, the dome-shaped hydrophilic porous particulate filter defining an interior volume free from porous particulate filter media, a hydrophilic filter sheet of sub micron media disposed in the lower interior volume of the lower portion defined by said cartridge shell, (b) an adhesive connection sealing said dome-shaped hydrophilic porous particulate filter carbon block to said upper portion of said cartridge shell in the lower end of said upper portion, and (c) wherein said filter cartridge is configured and arranged to receive an upper source of untreated water and to supply a lower container of treated water wherein said filter cartridge separates said upper source and said lower container to allow water to flow by force of gravity through said cap and said dome-shaped hydrophilic porous particulate filter carbon block through said interior volume free from porous particulate filter media and through said hydrophilic filter sheet, from said upper source to said lower container.