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Appendix Page 5 



provide a process for efficiently and effectively altering 

 the chemical nature or composition of tobacco, and in 

 particular to provide a process for controlling the 

 composition of a tobacco material." The extract can be 

 manipulated with the addition or removal of certain elements 

 before being reintroduced to the tobacco. 



The pH of the extraction solvent is controlled. The use of 

 ammonia, which raises the pH and increases nicotine 

 extraction, is specifically mentioned. 



The patent gives an indication of the degree to which 

 tobacco extracts can be manipulated and fine tuned to 

 control the final composition of a tobacco product. 



Adding tobacco extract to "reconstituted tobacco" 



Brown & Williamson Tobacco Corporation. Pat. 3,840,024, 1974. 



The patent describes a process for increasing the absorbency 

 of reconstituted tobacco sheet by incorporating bibulous 

 fibers. The resulting product, which is composed of from 5% 

 to 25% of these bibulous fibers, is capable of absorbing a 

 larger amount of additive than tobacco sheet made without 

 these fibers. This increased absorbency permits "the 

 impregnation of the base sheet, after drying, with a 

 sufficiently concentrated extract of tobacco." 



Adding tobacco extract to filters 



American Tobacco Company. Pat. 3,428,049, 1969. 



The patent discloses the insertion of breakable hollow 

 capsules into cigarette filters which the customer presses 

 on to release the contents into the filter prior to smoking. 

 The possible contents of capsules include tobacco extract. 

 A medication such as a decongestant is also suggested as a 

 possible additive in this system. 



Philip Morris Incorporated. Pat. 4,756,316, 1988. 



A method for applying additives to cigarette filter tow is 

 described. Tobacco extract is one of the additives that can 

 be used in this process . 



