Smoking article
Patent 4924883 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. 023051 filed on 03/06/1987US Classes:131/336, Air131/335By adding constituent to smoke streamExaminersPrimary: Millin, V.Assistant: Doyle, Jennifer L. Foreign Patent References
International ClassA24D 003/00AbstractA cigarette-type smoking article has a short tobacco-containing fuel element, a passageway for mainstream tobacco smoke flow, a flavor source which provides enhanced flavor to the tobacco smoke which passes therethrough, and a mouthend piece. The article is highly air diluted and the air dilution is provided through the periphery of the article as perforations in a region immediately behind the fuel element. Such an article delivers highly flavored mainstream tobacco smoke and relatively low levels of pyrolysis and/or combustion derived wet total particulate matter.Other References
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