Smoking article
Patent 4924888 Issued on May 15, 1990. Estimated Expiration Date: 
May 15, 2007. 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.
May 15, 2007. 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 ReferencesInventorsAssigneeApplicationNo. 051104 filed on 05/15/1987US Classes:131/336, Air131/331, SMOKE SEPARATOR OR TREATER131/360, Cigar or cigarette131/364, Blank or filler131/365Wrapper or binderExaminersPrimary: Millin, V.Foreign Patent References
International ClassA24D 001/02AbstractCigarettes having low efficiency filters, rods of cut filler having a low packing density, and paper wraps having a high net permeabilities and low inherent permeabilities can yield good taste, low gas phase mainstream deliveries as well as low amounts of visible sidestream smoke. Typical cigarettes have relatively large amounts of volume expanded flue-cured tobacco materials as cut filler, paper wraps containing magnesium oxide and/or magnesium hydroxide, and relatively high levels of air dilution.Other References
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