Smoking article filter
AssigneeEssentra Filter Products, Inc.
InventorsBrenton D. DILLIE, Ann TREADAWAY, Elizabeth GERRINGER
Life of this patent
Estimating the term…
Abstract
A filter or filter element comprising a longitudinally extending (e.g. cylindrical) rod of filtering material including a longitudinally extending channel which extends along the full length of the filter or filter element.
Claims26
A filter comprising a longitudinally extending rod of filtering material including at least one longitudinally extending channel which extends along the full length of the filter.
A filter comprising a longitudinally extending tubular rod of filtering material, the inner surface of the tubular rod of filtering material defining at least one channel which extends along the full length of the filter.
Dependencies are inferred from the claim text.