Smokers filter
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United States of America Patent
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Jul 19, 2011
Grant Date -
Jan 19, 2006
app pub date -
Oct 13, 2003
filing date -
Oct 23, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A tobacco smoke filter which has a tar retention of at most 50% and comprises a relatively high draw resistance downstream filtering plug of at most 50% tar retention, a relatively low draw resistance upstream filter plug of at most 22% tar retention spaced longitudinally upstream therefrom, and a filter wrapper engaging around and joining the spaced plugs to define a cavity therebetween.
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