Back to results
US 5,671,757 AGranted
Cigarette filters
AssigneeCourtaulds Fibres (Holdings) Limited
InventorCalvin Roger Woodings
Life of this patent
Estimating the term…
Abstract
A cigarette filter in which the body of the filter comprises paper containing, or consisting essentially of, lyocell fibres. The invention also relates to a cigarette incorporsting such a filter.
Claims9
A cigarette filter, wherein the body of the filter comprises paper which contains lyocell fibres.
A cigarette filter wherein the body of the filter comprises paper which contains lyocell fibres and further wherein the lyocell fibres are made by a process including the step of extruding a solution of cellulose in a tertiary amine N-oxide into an aqueous coagulating bath.
Dependencies are inferred from the claim text.