Smoking devices
Patent 4596258 Issued on June 24, 1986. Estimated Expiration Date: 
May 18, 2004. 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.
May 18, 2004. 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 ReferencesInventorApplicationNo. 06/611941 filed on 05/18/1984US Classes:131/198.1, Supplemental or substitute air inlet131/195, Cooling air passages131/196, Spaced inner bowl131/200Smoke treatingExaminersPrimary: Millin, V.Attorney, Agent or FirmInternational ClassesA24D 1/00 (20060101)A24F 1/00 (20060101) A24F 47/00 (20060101) AbstractA smoking device is disclosed which allows the user to regulate the air he inhales to consist of pure tobacco smoke, pure air, pure air carrying volatile substances, or a mixture of tobacco smoke and air carrying volatile substances. This is accomplished by a smoking device having three air passages and means to selectively open and close these passages. | |
