Tobacco smoke filter

Abstract

A tobacco smoke filter or filter element comprising: a tobacco smoke filtering material including paper; and a flavour enhancing additive.

1 - 26 . (canceled) 
     
     
         27 . A tobacco smoke filter or filter element comprising a tobacco smoke filter including paper and a flavour enhancing additive selected from the group consisting of an alicyclic lactone, an aromatic lactone, an aromatic ketone, and a secondary alcohol or ester thereof, and a phthalide. 
     
     
         28 . A tobacco smoke filter or filter element according to  claim 27  wherein the flavour enhancing additive is  χ -Valerolactone,  χ -Hexalactone, δ-Hexalactone,  χ -Heptalactone,  χ -Octalactone, δ-Octalactone, 4-Hydroxy-3-pentenoic acid lactone, 5-Hydroxy-2-decenoic acid δ-lactone, 4,4-Dibutyl- χ -butyrolactone, Mintlactone, Dehydromenthofurolactone, 3-Butylidenephthalide, 3-n-Butylphthalide, Whiskey lactone or sedanenolide. 
     
     
         29 . A tobacco smoke filter or filter element according to  claim 27  wherein the flavour enhancing additive is included in the form of an unresolved mixture of compounds which includes the flavour enhancing additive. 
     
     
         30 . A tobacco smoke filter or filter element according to  claim 29  wherein the unresolved mixture of compounds which includes the flavour enhancing additive is an essential oil. 
     
     
         31 . A tobacco smoke filter or filter element according to  claim 29  wherein the unresolved mixture of compounds which includes the flavour enhancing additive is essential oil of seed of celery or Massoia bark oil. 
     
     
         32 . A tobacco smoke filter or filter element according to  claim 27  wherein the paper is filtering paper, aperture paper or crepe paper. 
     
     
         33 . A tobacco smoke filter or filter element according to  claim 27  wherein the paper is a web of paper which has been gathered laterally into, and held, in rod form. 
     
     
         34 . A tobacco smoke filter or filter element according to  claim 27  wherein the tobacco smoke filtering material is a cylindrical rod of filtering material. 
     
     
         35 . A tobacco smoke filter or filter element according to  claim 27  wherein the tobacco smoke filtering material includes paper and one or more further filtering materials. 
     
     
         36 . A tobacco smoke filter or filter element according to  claim 27  further comprising a further additive which selectively reduces one or more phenolic compounds found in the volatile and/or semi-volatile phases of cigarette smoke. 
     
     
         37 . A tobacco smoke filter or filter element according to  claim 36  wherein the further additive is a polyethylene glycol or a methoxypolyethylene glycol. 
     
     
         38 . A tobacco smoke filter or filter element according to  claim 36  wherein the further additive is present in an amount which is up to 20% by weight (w/w) of the paper in the filter or filter element. 
     
     
         39 . A tobacco smoke filter or filter element according to  claim 27  over wrapped with a wrapper. 
     
     
         40 . A multiple length filter rod comprising a plurality of filter or filter elements according to  claim 27  joined together end to end. 
     
     
         41 . A filter cigarette comprising: a filter or filter element which includes paper according to  claim 27  and a wrapped tobacco rod. 
     
     
         42 . A filter or filter element comprising: a tobacco smoke filtering material and a flavour enhancing additive selected from the group consisting of an alicyclic lactone, an aromatic lactone, an aromatic ketone, and a secondary alcohol or ester thereof, and a phthalide. 
     
     
         43 . A filter or filter element according to  claim 42  for a smoking article which heats tobacco. 
     
     
         44 . A filter or filter element according to  claim 42  wherein the flavour enhancing additive is an alicyclic lactone, an aromatic lactone, an aromatic ketone, or secondary alcohol or ester thereof. 
     
     
         45 . A filter or filter element according to  claim 42  wherein the flavour enhancing additive is a phthalide. 
     
     
         46 . A tobacco smoke filter or filter element according to  claim 42  wherein the flavour enhancing additive is  χ -Valerolactone,  χ -Hexalactone, δ-Hexalactone,  χ -Heptalactone,  χ -Octalactone, δ-Octalactone, 4-Hydroxy-3-pentenoic acid lactone, 5-Hydroxy-2-decenoic acid δ-lactone, 4,4-Dibutyl- χ -butyrolactone, Mintlactone, Dehydromenthofurolactone, 3-Butylidenephthalide, 3-n-Butylphthalide, Whiskey lactone or sedanenolide.