US2008149120A1PendingUtilityA1

Cigarette filter incorporating nanofibers

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Individually held — no corporate assignee on recordPriority: Jul 21, 2003Filed: Aug 20, 2007Published: Jun 26, 2008
Est. expiryJul 21, 2023(expired)· nominal 20-yr term from priority
Inventors:Stephen B. SquiresMichael Gardiner
A24D 3/10A24B 15/286A24D 3/163A24D 3/04
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Claims

Abstract

A cigarette is equipped with a filter incorporating nanofibers. The nanofibers can be used either alone or in conjunction with other filtering media such as larger fibers, paper, activated charcoal, etc. With a nanofiber filter, the filter need not be as dense as the molecules of the smoke become attracted to the nanofiber due to quantum mechanics instead of being sieved out. The efficacy of the filter is better than filters with larger diameter fibers.

Claims

exact text as granted — not AI-modified
1 . A cigarette, comprising:
 a) a tobacco rod;   b) a filter coupled to the tobacco rod and comprising a tow made of nanofibers.   
     
     
         2 . The cigarette of  claim 1 , wherein the pressure drop across the filter is between 50-150 mm wg. 
     
     
         3 . The cigarette of  claim 1 , wherein the weight of the filter is between 50-400 g/1000 rods. 
     
     
         4 . The cigarette of  claim 1 , wherein the filter tow is comprised of cellulose acetate. 
     
     
         5 . The cigarette of  claim 1 , wherein the filter comprises activated charcoal.

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