CIGARETTE FILTER
United States Patent 3460543
US Patent References:
Impregnated carbon and process of making same
- - 1519470

Tobacco smoke filter
- - 2795227

Smoking device
- - 2915069

Fibrous cigarette filter
- - 3101723

Tobacco smoke filter
- - 3251365


Inventors:
Keith, Charles H.
Bates Jr., William W.
Publication Date:
08/12/1969
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Assignee:
LIGGETT & MYERS INC
Primary Class:
131/342
Other Classes:
131/334
International Classes:
A24D3/16; A24D3/00; A24C5/50; A24D1/06




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