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Appendix Page 7 



capable of producing cigarettes with two different charges 

 of smokable material, with one positioned distally, near the 

 lit end, and the other proximally, near the filter. 



In each case, the patent describes using a more expensive, 

 more flavorful blend distally and a relatively bland, filler 

 mixture proximally. This design permits the initial draws 

 on the lit cigarette to be more flavorful while perhaps 

 enabling the later draws, flavored more by smoke material 

 distilled from the richer mixture, to not be overpowering. 

 These designs seem to accomplish two things: they permit 

 the use of less expensive filler for part of the rod and 

 they may provide for a more even delivery of nicotine and 

 other smoke components throughout the smoking of the 

 cigarette. In conventional cigarettes, nicotine delivery 

 increases with each succeeding puff. That would not 

 necessarily be the case with this design, depending on the 

 cortiposition of the two smoking mixtures and how their 

 respective zones overlapped. 



An effect similar to that achieved by adding tobacco extract 

 to the filter could be achieved by reversing the strategy 

 described in the patents. These inventions would permit 

 placing a charge of more potent tobacco, such as pure 

 burley, at the proximal position, next to the filter. Smoke 

 drawn through this charge of burley would pick up volatiles, 

 including nicotine, from the burley. If the burley charge 

 were sufficiently short, or if the tipping paper overwrap 

 sufficiently long, it would not be burned. 



Lowering "tar" and nicotine delivery by reducing the puff count 



R. J. Reynolds Tobacco Company. Pat. 4,776,354, 1988. 



This patent discloses a cigarette design which, by using an 

 unusually long filter, reduces the number of puffs the 

 consumer can take. In doing so, the resulting overall "tar" 

 and nicotine numbers resemble those of a low tar brand, but 

 on a puff by puff basis, the smoke delivery from the 

 cigarette can exactly match the initial puffs from a "full 

 flavor" brand. This design takes advantage of the fact that 

 smoke delivery increases with succeeding puffs. Eliminating 

 the later puffs can reduce overall deliveries substantially. 



Denicotinized tobacco 



R. J. Reynolds Tobacco Company. Pat. 5,025,812, 1991. 



This is one of many patents for the denicotinizing of 

 tobacco. The process described here involves an aqueous 

 extraction of tobacco using an alkaline solvent. The 

 resulting extract is then processed by mixing it with an 

 immiscible liquid in which the nicotine becomes dissolved. 

 The two liquids are then separated. The processed, 

 denicotinized extract can then be returned to the tobacco. 

 Extraction efficiencies of 90% to 95% are claimed. 



