Filter cigarette
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United States of America Patent
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May 14, 2013
Grant Date -
Jan 22, 2009
app pub date -
Jan 16, 2006
filing date -
Feb 1, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
In a filter cigarette having a tobacco strand, a wrapping and a filter, the filter possesses at least one gas phase-active filter part which contains at least one gas phase-reducing substance. The gas phase-reducing substances are embedded in a filter material matrix. They are introduced in a quantity of at least 75 mg per filter and at least 5 mg/mm of the length of the gas phase-active filter part. The filter cigarette exhibits a filter ventilation of at most 30% (or of from 30% to 70%). The NFDPM value is between 4 and 10 mg/cigarette (or in the range of from 2 to 4 mg/Cigarette), as measured in accordance with ISO smoking conditions. The gas phase quotient Q1, defined as (μg of benzene per cigarette)/(mg of CO per cigarette) and measured in accordance with ISO smoking conditions, is less than 1.5, preferably less than 1.
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