Smoking articles with activated carbon and sodium bicarbonate-treated fibers and method of treating mainstream smoke
AssigneePhilip Morris USA Inc.
InventorsLixin Xue, Liqun Yu, Joel Schendel
Life of this patent
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Abstract
Filters and smoking articles include sodium bicarbonate-treated fibers and activated carbon capable of selectively removing one or more selected constituents from mainstream smoke. Methods for making cigarette filters and cigarettes using the sodium bicarbonate-treated fibers and activated carbon, and methods for treating mainstream smoke comprising the sodium bicarbonate-treated fibers and activated carbon are also provided.
Claims26
A cigarette filter, comprising:
- a mouth end;
- activated carbon;
- and
- sodium bicarbonate-treated fibers located between the activated carbon and the mouth end.
A cigarette, comprising:
- a tobacco column;
- and
- a cigarette filter attached to the tobacco column by tipping paper, the cigarette filter comprising:
- a mouth end;
- activated carbon;
- and
- sodium bicarbonate-treated fibers located between the activated carbon and the mouth end.
A method of treating mainstream smoke comprising removing smoke constituents by contacting mainstream smoke with an activated carbon and subsequently contacting the mainstream smoke with one or more sodium bicarbonate treated fibers.
A smoking article comprising:
- tobacco;
- activated carbon;
- and
- one or more sodium bicarbonate-treated fibers arranged such that mainstream smoke produced by the tobacco contacts the activated carbon before contacting the one or more sodium bicarbonate-treated fibers.
Dependencies are inferred from the claim text.