Cigarette
Patent 4570650 Issued on February 18, 1986. Estimated Expiration Date: 
July 28, 2003. 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.
July 28, 2003. 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 ReferencesFiltering pipe with extinguisher for cigarettes Patent #: 4121597 InventorApplicationNo. 06/518058 filed on 07/28/1983US Classes:131/349, With ash retainer or means to prevent or retard burning131/361, End structure131/362Coated or impregnatedExaminersPrimary: Millin, V.Attorney, Agent or FirmInternational ClassesA24D 1/10 (20060101)A24D 1/00 (20060101) A24D 1/02 (20060101) AbstractA cigarette has a front tobacco-containing part composed of a tubular member of cigarette paper and a tobacco filler, a rear part extending rearwardly from the front part and having a filter, and a tubular coating extending around at least one fourth of the length of the front part from the rear end of the latter, so as to extinguish the cigarette when the flame reaches this region and prevent smoking of the cigarette in this region. The tubular coating is formed of one piece with a tubular connector which connects the filter with the tobacco-containing part of the cigarette. | |
