Smoking materials
Patent 4286604 Issued on September 1, 1981. Estimated Expiration Date: 
September 1, 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.
September 1, 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 References 3524602 3638660 3861402 Synthetic smoking product Patent #: 3943941 Inventors
AssigneeApplicationNo. 05/838712 filed on 10/03/1977US Classes:131/359Tobacco substitute, i.e., nontobaccoExaminersPrimary: Millin, V.Attorney, Agent or FirmInternational ClassesA24B 15/16 (20060101)A24B 15/00 (20060101) Foreign Application Priority Data1976-10-05 GBAbstractThe invention is concerned with a tobacco substitute which is made by subjecting a strand of viscose fibres to a controlled pyrolysis until the organic residue contains at least 90% carbon by weight, and loading the carbon strand with ingredients for smoking. | |
