Removal of nicotine from tobacco smoke
Patent 5462072 Issued on October 31, 1995. Estimated Expiration Date: 
January 18, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 18, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2429567 3550600 3724469 3842070 3875949 Article for the selective removal of hydrogen cyanide from tobacco smoke Tobacco composition Smoking preparations Process for producing granule coated with tannic acid metal chelate compound Tobacco smoke filter InventorsAssigneeApplicationNo. 183107 filed on 01/18/1994US Classes:131/334, By chemical reaction, e.g., ion-exchange, chelating, catalytic, etc.131/331SMOKE SEPARATOR OR TREATERExaminersPrimary: Bahr, JenniferAttorney, Agent or FirmForeign Patent References
International ClassA24D 003/12AbstractThe instant invention is directd to the removal of nicotine from tobacco smoke by the use of compounds containing a metal with a valence of +2.Other References
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