Water filter device

Details Water filter device Water filter device

1975-02-10

1977-05-24

Spear, Jr., Frank A.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

210449, 210489, 210503, B01D 2700

Patent

active

040254380

ABSTRACT:
In accordance with the invention there is provided a water filter and water filter cartridge having an upper water filtering layer containing charcoal particles, a lower filtering layer having a submicron pore size and an intermediate filtering layer having a pore size greater than that of the lower layer but less than the particle size of the charcoal in the upper layer.

REFERENCES:
patent: 966963 (1910-08-01), Steinkoenig
patent: 2328381 (1943-08-01), Jaffe
patent: 2773601 (1956-12-01), Keller et al.
patent: 3266628 (1966-08-01), Price
patent: 3327859 (1967-06-01), Pall
patent: 3357563 (1967-12-01), Sicard
patent: 3529726 (1970-09-01), Keenan
patent: 3585130 (1970-06-01), Gregory
patent: 3746174 (1973-07-01), Watanabe
patent: 3799352 (1974-03-01), McClive

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