A - Human Necessities – 24 – D
Patent
A - Human Necessities
24
D
131/21
A24D 3/00 (2006.01) A24D 3/04 (2006.01)
Patent
CA 1196833
UNITED STATES PATENT APPLICATION of Donald A Silberstein for CIGARETTE FILTER ABSTRACT OF THE DISCLOSURE A filter for a cigarette has a porous filter rod with a channel extending longitudinally through the filter rod. The end of the channel at the tobacco column of the cigarette is closed by a smoke impervious wall having an orifice therein of a smaller cross-sectional area than the cross sectional area of the channel to provide flow communication between the tobacco column and the channel. The filter rod can be circumscribed with an air pervious tipping material.
411643
Brown & Williamson Tobacco Corporation
Mitches & Co.
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