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| Number | Title | Issue Date |
| 6164288 | Cigarette filter containing dry water and microcapsules A tobacco smoke filter containing a porous substrate having dry water and microcapsules dispersed therein. The microcapsules contain at least one compound selected from the group consisting of chlorophyllin, methylcellulose, sodium pyroglutamate and a veg... | 12/26/2000 |
| 5975086 | Cigarette filter containing dry water and microcapsules A tobacco smoke filter consisting essentially of a porous substrate having dry water and microcapsules dispersed therein. The microcapsules comprise at least one substance selected from the group consisting of chlorophyllin, methylcellulose, sodium pyrogl... | 11/02/1999 |
| 5860428 | Cigarette filter containing a humectant A cigarette filter comprises a humectant, preferably sodium pyroglutamate, and optionally a surfactant. The humectant absorbs moisture from the tobacco smoke for wet-filtration of the tobacco smoke.... | 01/19/1999 |
| 5746231 | Tobacco smoke filter for removing toxic compounds A 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... | 05/05/1998 |
