DE2118770
1315374 Tobacco-smoke filters BRITISH AMERICAN TOBACCO CO Ltd 19 April 1971 [20 April 1970] 18758/70 Heading A2C [Also in Divisions Bl Cl and F4] Triple cigarette filters comprise a centre section containing a granular manganese dioxide (which may contain 8% Ag and 7% Cu) and two shorter outer secti...
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Main Author | |
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Format | Patent |
Language | English |
Published |
28.06.1979
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Subjects | |
Online Access | Get full text |
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Summary: | 1315374 Tobacco-smoke filters BRITISH AMERICAN TOBACCO CO Ltd 19 April 1971 [20 April 1970] 18758/70 Heading A2C [Also in Divisions Bl Cl and F4] Triple cigarette filters comprise a centre section containing a granular manganese dioxide (which may contain 8% Ag and 7% Cu) and two shorter outer sections each of conventional filtering material. The granules may be 0.30-0.71 mm. The filter removes CO by oxidation to CO 2 . The preparation of the manganese dioxide is described (Division Cl). |
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Bibliography: | Application Number: DE19712118770 |