Cigarette filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 14, 1983
Grant Date -
N/A
app pub date -
Mar 19, 1981
filing date -
Mar 19, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A filter for a cigarette includes a porous filter rod circumscribed by a non-porous wrapper wherein the filter rod with the non-porous wrapper therearound is provided with grooves extending from one end thereof a preselected distance longitudinally therealong. The grooves are open to the atmosphere and may be oriented to extend to the mouth end of the filter when connected to a cigarette, to the tobacco end of the filter when connected to the cigarette, or non-connecting grooves which extend from each end of the filter element a preselected distance therealong.
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Family
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Cited Art Landscape
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