Tobacco smoke filter

Tobacco – Tobacco users' appliance – Supports

Patent

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Details

4234471, A24B 1502

Patent

active

041956494

ABSTRACT:
A tobacco smoke filter capable of selectively removing irritating materials and unpleasant bitter components from tobacco smoke and containing as a filter element nitrogen-containing activated carbon fibers produced by oxidizing acrylonitrile polymer fibers and then activating the oxidized fibers.

REFERENCES:
patent: 3011981 (1961-12-01), Soltes
patent: 3319629 (1967-05-01), Chamberlain
patent: 3337301 (1967-08-01), McWhorter et al.
patent: 4009305 (1977-02-01), Fujimaki et al.
patent: 4080417 (1978-03-01), Kishimoto et al.

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