Controlled pore size coffee filter

Details Controlled pore size coffee filter Controlled pore size coffee filter

1989-11-30

1991-07-02

Dawson, Robert A.

Liquid purification or separation

Filter

Resting on supporting receiver, e.g., portable

2104973, 99295, 426 77, B01D 3528

Patent

active

050283286

ABSTRACT:
A washable coffee filter using a plastic membrane with a multiplicity of openings with a maximum diameter of less-than-20-microns for making a clear beverage by hot water extraction of finely ground coffee beans.

REFERENCES:
patent: 3935112 (1976-01-01), Greutert
patent: 3943058 (1976-03-01), Wurm

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