Filter for a smoking article
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United States of America Patent
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Jun 30, 2015
Grant Date -
Jun 30, 2011
app pub date -
May 27, 2009
filing date -
May 30, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A multi-section filter (5) for a smoking article comprises at least a first (5B) and a second filter section (5A). The first filter section (5B) is at a mouth end of the filter (5) and the second filter section includes a set of ventilation holes (17) and a set of grooves (7). The grooves (7) extend from respective ventilation holes (17) along the second filter section (5A) up to but not into the first filter section (5B).
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