Filter cigarette
Patent 4677995 Issued on July 7, 1987. Estimated Expiration Date: 
February 24, 2006. 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.
February 24, 2006. 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 2954035 3016902 3359988 3428050 3463166 3515146 3596665 Adjustable filter cigarette Variably ventilated filter cigarette Patent #: 4593707 InventorsApplicationNo. 06/831837 filed on 02/24/1986US Classes:131/335, By adding constituent to smoke stream131/336, Air131/338, Having means to vary smoke flow rate131/339Interior surface causes particular flow characteristicExaminersPrimary: Millin, V.Attorney, Agent or FirmInternational ClassesA24D 3/00 (20060101)A24D 3/04 (20060101) AbstractA filter cigarette is provided in which the smoker can select varying levels of one or more flavorants to be added to the smoke stream. A rotatable filter segment having several smoke flow paths, each containing a different flavorant material, cooperates with a baffle to select one or more paths through which the smoke stream will travel. | |
