Activated carbon fiber cigarette filter
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United States of America Patent
Stats
-
Jun 30, 2009
Grant Date -
Oct 30, 2003
app pub date -
Apr 11, 2003
filing date -
Apr 12, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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