Tobacco smoke filter for removing toxic compounds
Patent 5746231 Issued on May 5, 1998. Estimated Expiration Date: 
May 15, 2016. 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 15, 2016. 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 3279476 3313305 3355317 3658070 3674540 3884246 3886955 Filter and detector and methods of using same in the removal and detection of carbon monoxide from, and in, a gas stream Cigarette and filter for tobacco smoke Filter and cigarette including a filter InventorsAssigneeApplicationNo. 648314 filed on 05/15/1996US Classes:131/334, By chemical reaction, e.g., ion-exchange, chelating, catalytic, etc.131/331, SMOKE SEPARATOR OR TREATER131/335, By adding constituent to smoke stream131/337Having destructible, fusible, soluble, or deformable container for treatment materialExaminersPrimary: Millin, VincentAssistant: Anderson, Harold D. Attorney, Agent or FirmForeign Patent References
International ClassA24D 003/00AbstractA tobacco smoke filter comprising a porous substrate having a humectant, such as sodium pyroglutamate, dispersed therein to absorb moisture from the tobacco smoke thereby wet-filtering the tobacco smoke. The tobacco smoke filter can also comprise a porous substrate having microcapsules dispersed therein. The microcapsules can comprise a humectant such as sodium pyroglutamate. The microcapsules further preferably comprise one or more of methylcellulose, chlorophyllin and at least one vegetable oil. The tobacco smoke filter can also comprise a porous substrate having dry water and a porphyrin dispersed therein. The tobacco smoke filter can also comprise a porous substrate having a copper-containing porphyrin dispersed therein.Other References
Field of SearchSMOKE SEPARATOR OR TREATERBy chemical reaction, e.g., ion-exchange, chelating, catalytic, etc. By adding constituent to smoke stream Having destructible, fusible, soluble, or deformable container for treatment material Cellular product formation prior to or during solid polymer formation in the presence of a stated ingredient other than water Porphyrins (including hydrogenated; e.g., chlorophyll, etc.) Actinide series metal (At. No. 89+) | |
