Wrapper for smoking articles and method
Patent 4450847 Issued on May 29, 1984. Estimated Expiration Date: 
April 7, 2002. 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.
April 7, 2002. 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 2733720 2890704 2998012 Wrapper for smoking articles containing magnesium oxide Patent #: 4231377 InventorAssigneeApplicationNo. 06/366315 filed on 04/07/1982US Classes:131/365, Wrapper or binder131/331, SMOKE SEPARATOR OR TREATER131/334, By chemical reaction, e.g., ion-exchange, chelating, catalytic, etc.131/335By adding constituent to smoke streamExaminersPrimary: Millin, VincentAttorney, Agent or FirmInternational ClassesA24D 1/02 (20060101)A24D 1/00 (20060101) D21H 17/70 (20060101) D21H 17/00 (20060101) AbstractA wrapper for smoking articles such as cigarettes, cigars and the like containing precipitated amorphous magnesium hydroxide gel. Other components of the filler for the wrapper can be either an unreactive grade of magnesium oxide or calcium carbonate. For the most effective reduction in sidestream tar and visible sidestream smoke the basis weight of the paper should be between 30 g/M2 and 100 g/M2. The filler should constitute 30% to 60% of the total sheet weight. The precipitated magnesium hydroxide gel should be present to the extent of approximately 5% to 50% by weight of the total filler and preferably between 10% and 25%. | |
