05325765 is referenced by 254 patents and cites 20 patents.

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 of the base so that the filter element diverges from the base and divides the base into two sealed chambers, a first chamber for storing an extract of the beverage to be made, and a second empty chamber for accessing the beverage after the beverage outflow from the filter has been made by combining a liquid with the extract; and an impermeable pierceable cover sealingly engaged with the opening in the base to form an impermeable cartridge.

Title
Beverage filter cartridge
Application Number
7/945746
Publication Number
5325765
Application Date
September 16, 1992
Publication Date
July 5, 1994
Inventor
Peter B Dragone
Concord
MA, US
John E Sylvan
Brookline
MA, US
Agent
Samuels Gauthier & Stevens
Assignee
Keurig
MA, US
IPC
A47J 31/14
A47J 31/24
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