| US 7,487,782 B2 | ||
| Cigarette filter | ||
| Takashi Sasaki, Tokyo (Japan); Masafumi Tarora, Tokyo (Japan); and Takashi Hasegawa, Tokyo (Japan) | ||
| Assigned to Japan Tobacco Inc., Tokyo (Japan) | ||
| Filed on Mar. 17, 2005, as Appl. No. 11/81,549. | ||
| Application 11/081549 is a continuation of application No. PCT/JP03/11725, filed on Sep. 12, 2003. | ||
| Claims priority of application No. 2002-273288 (JP), filed on Sep. 19, 2002. | ||
| Prior Publication US 2005/0161054 A1, Jul. 28, 2005 | ||
| Int. Cl. A24D 3/16 (2006.01) | ||
| U.S. Cl. 131—334 [131/331] | 1 Claim |
| 1. A cigarette filter, comprising a filter medium containing
an inorganic basic substance selected from the group consisting of sodium carbonate, potassium carbonate, sodium bicarbonate,
potassium bicarbonate and ammonium bicarbonate, sodium phosphate, potassium phosphate, disodium hydrogenphosphate, dipotassium
hydrogenphosphate, sodium dihydrogenphosphate, potassium dihydrogenphosphate, and ammonium dihydrogenphosphate, and
a moisturizing agent consisting of sodium propionate,
wherein the inorganic basic substance is contained in an amount of 3.5 mg and 10.5 mg, and
wherein a ratio of the inorganic basic substance to the moisturizing agent falls within a range of between 1:1 and 1:2.
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