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US 4,729,391 AGranted
Microporous materials in cigarette filter construction
AssigneeR. J. Reynolds Tobacco Company
InventorsDonna K. Woods, Donald L. Roberts
Life of this patent
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Abstract
Flavor-carrying microporous polymer material is incorporated with a cigarette filter to release flavor into the smoke-stream during smoking of the cigarette.
Claims2
An improved filter cigarette comprising a tobacco rod having a filter attached thereto, wherein said filter comprises filter tow wrapped with a sheet of microporous polymer having flavorant adsorbed therein for release into the smoke stream during smoking of the cigarette.
Dependencies are inferred from the claim text.