Cigarette filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 28, 1982
Issued Date -
N/A
app pub date -
Mar 12, 1981
filing date -
Apr 11, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cigarette filter includes a porous filter element attached to a cigarette, the element circumscribed by ventilating air ducts with an impermeable barrier therebetween so that smoke travels down the filter element and ventilating air travels down the ducts during use. The size of the ducts, the number of ducts, and the flow rate of ventilating air is so defined that substantially all of the smoke is dispersed immediately upon exiting the filter element.
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Family
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