Cigarette filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 29, 1996
Issued Date -
N/A
app pub date -
Jun 22, 1994
filing date -
Jun 11, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cigarette includes a filter element including a carbon-containing paper or a paper containing molecular sieves. The paper contacts the filter material, such as cellulose acetate tow, within the filter element, either by circumscribing the filter material or by being gathered with non-carbon-containing filter material. The paper is useful as a plug wrap for a filter element. In several embodiments, longitudinal grooves are provided on the periphery of the filter element.
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Family
International Classification(s)
Cited Art Landscape
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