Wrapper for smoking articles containing magnesium oxide
Patent 4231377 Issued on November 4, 1980. Estimated Expiration Date: 
August 30, 1998. 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.
August 30, 1998. 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. 05/937936 filed on 08/30/1978US Classes:131/342, Including particulate material131/331, SMOKE SEPARATOR OR TREATER131/334, By chemical reaction, e.g., ion-exchange, chelating, catalytic, etc.131/365Wrapper or binderExaminersPrimary: Millin, V.Attorney, Agent or FirmInternational ClassesA24D 1/02 (20060101)A24D 1/00 (20060101) AbstractA wrapper for smoking articles such as cigarettes, cigars and the like containing at least 15% by weight magnesium oxide or its hydrate and at least 0.5% by weight of a specific chemical adjuvant such as the alkali metal acetates, carbonates, citrates, nitrates or tartrates. The combination of magnesium oxide or its hydrate with any of the chemical adjuvants significantly reduces visible sidestream smoke that emanates during static burning from smoking articles employing the wrapper. The wrapper may comprise conventional cigarette paper with magnesium oxide and the adjuvant incorporated therein as the filler in the paper furnish or either or both of the additives may be applied to the paper as a coating. Wrappers containing the additives can be used in place of conventional wrappers for smoking articles or used as an inner wrapper for the tobacco column in combination with a conventional outer wrapping of cigarette paper or cigar wrap.Other References
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