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US 4,493,331 AGranted
Cigarette filter
AssigneeBrown & Williamson Tobacco Corporation
InventorHarry S. Porenski, Jr.
Life of this patent
Estimating the term…
Abstract
A filter for a cigarette which includes a protrusion of smoke permeable material integral with and coaxially projecting from the mouth end of the filter rod. The mouth end of the filter rod surrounding the protrusion is smoke impermeable so that as the cigarette to which the filter is attached is smoked, the smoke will exit the filter rod in generally radially outward direction through the smoke permeable protrusion.
Claims12
A filter for a cigarette comprising:
- a filter rod fabricated of a smoke permeable material and being of generally cylindrical configuration having opposed smoke inlet and outlet ends;
- said mouth end including a protrusion integral with and in smoke flow communication with the smoke permeable material and coaxially projecting outwardly from said filter rod, the peripheral wall of said protrusion being smoke permeable, the remaining portion of said mouth end of said filter rod being impermeable.
Dependencies are inferred from the claim text.