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Home › High efficiency cigarette filters having shaped microcavity fibers impregnated with adsorbent or absorbent materials

High efficiency cigarette filters having shaped microcavity fibers impregnated with adsorbent or absorbent materials

US Patent 6584979 · Granted Jul 1, 2003

Estimated economic value: $952,721,000 ⓘ

Assignee

Philip Morris Usa

Inventors

Lixin Xue (43 patents)
Kent B. Koller (25 patents)
Qiong Gao (14 patents)

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