Smoking article having reduced sidestream smoke
Patent 4561454 Issued on December 31, 1985. Estimated Expiration Date: 
June 15, 2004. 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.
June 15, 2004. 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 2091598 3395714 3586005 3633589 3744496 3902504 3908671 Smoking article High porosity carbon coated cigarette papers Wrapper for smoking articles containing magnesium oxide Patent #: 4231377 InventorAssigneeApplicationNo. 06/620538 filed on 06/15/1984US Classes:131/365, Wrapper or binder131/334By chemical reaction, e.g., ion-exchange, chelating, catalytic, etc.ExaminersPrimary: Millin, V.Assistant: Beaucage, Gregory Attorney, Agent or FirmInternational ClassesA24D 1/00 (20060101)A24D 1/02 (20060101) AbstractThe sidestream smoke emanated by a smoking article, such as a cigarette, can be significantly reduced by constructing the smoking article with a double wrapper, one of the wrappers having alkali metal salt burning additives in an amount in the range from about 9 to 20% by weight. A commercially feasible reduced sidestream cigarette can be produced according to this invention, having both wrappers made from a low-porosity flax base, with the inner wrapper containing 11% and the outer wrapper 6% potassium citrate.Other References
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