1
John E Sylvan, Peter B Dragone: Beverage filter cartridge. Keurig, Samuels Gauthier & Stevens, July 5, 1994: US05325765 (252 worldwide citation)

A beverage filter cartridge includes an impermeable pierceable base having a predetermined shape and an opening at one end; a self-supporting wettable filter element disposed in the base sealingly engages with the opening in the base and has a form different and smaller than the predetermined shape ...


2
John E Sylvan, Peter B Dragone: Beverage filter cartridge. Keurig, Samuels Gauthier Stevens & Reppert, November 24, 1998: US05840189 (206 worldwide citation)

A beverage filter cartridge includes an impermeable yieldably pierceable base having a predetermined shape and an access opening at one end. A self-supporting wettable filter element is disposed in the base and is permanently sealed to an interior surface of the base. The filter element subdivides t ...