Tobacco – Smoke separator or treater – Interior surface causes particular flow characteristic
Reexamination Certificate
2003-04-11
2009-06-30
Tucker, Philip C (Department: 1791)
Tobacco
Smoke separator or treater
Interior surface causes particular flow characteristic
C131S342000
Reexamination Certificate
active
07552735
ABSTRACT:
A cigarette filter for removing gas phase constituents from mainstream cigarette smoke as the smoke is drawn through the filter primarily comprises an activated carbon fiber filter section including a bundle of activated carbon fibers. Particulate adsorbent materials such as granules, beads or course powders may be dispersed amongst the activated carbon fibers to aid in removal of the gas phase constituents. Additionally, the activated carbon fiber filter section may be used in combination with a separate bed or beds of particulate adsorbent material. In one embodiment, the activated carbon fibers are positioned within a helical groove on the outside of a threaded rod within the activated carbon fiber filter section. Relatively smaller amounts of activated carbon fibers produce the same smoke constituent reduction as larger amounts of particulate adsorbent material.
REFERENCES:
patent: 5191905 (1993-03-01), Tsukamoto
patent: 6257242 (2001-07-01), Stavridis
“Selective Removal of Semivolatile Components of Cigarette Smoke by Activated Carbon Fibers”; Atsushi Tokida et al; pp. T-539-T-547; vol. 41, No. 12 (1985).
“Selective Adsorption of the Vapor Phase Components of Cigarette Smoke by Activated Carbon Fibers”; Atsushi Tokida et al; pp. T-435-T443; vol. 42, No. 8 (1986).
Fournier Jay A
Koller Kent Brian
Nepomuceno Jose G.
Paine, III John Bryant
Sherwood Timothy Scott
Connolly Bove & Lodge & Hutz LLP
Felton Michael J
Philip Morris USA Inc.
Tucker Philip C
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