Odor filtering device

Details Odor filtering device Odor filtering device

1977-05-31

1980-01-01

Saifer, Robert W.

Fluid sprinkling, spraying, and diffusing

Slow diffusers

Liquid supply in absorbent or porous media only

A61L 904

Patent

active

041812557

ABSTRACT:
An odor filtering device for space dispensing a volatile oil by soaking a porous substrate with a malodor counteractant composition. The exposed surface of the substrate permits evaporation of malodor counteractant creating an internal vapor pressure differential which drives the counteractant from the interior of the substrate to the surface to replace the surface loss. Particular devices are formed and arranged to permit controlled release of the malodor counteractant over an extended period of time.

REFERENCES:
patent: 1536741 (1925-05-01), Alden
patent: 2596659 (1952-05-01), D'Eustachio
patent: 3567119 (1971-03-01), Wilbert et al.
patent: 3753500 (1973-08-01), Voegeli
patent: 3945950 (1976-03-01), Vosganiantz
patent: 4009253 (1977-02-01), Schleppnik
patent: 4051159 (1977-09-01), Tsoucalas et al.

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