Non fibrous cigarette filter

Details Non fibrous cigarette filter Non fibrous cigarette filter

1975-05-14

1977-07-12

Michell, Robert W.

Tobacco

Tobacco users' appliance

Supports

A24D 104

Patent

active

040347680

ABSTRACT:
A novel cigarette filter comprised a porous sponge of non woven particles of a polymer of 2-pyrrolidone of the formula:

REFERENCES:
patent: 3327715 (1967-06-01), Azorlosa
patent: 3538920 (1970-11-01), Davis
patent: 3681293 (1972-08-01), Jarovitzky
patent: 3686066 (1972-08-01), Peters

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