IMPROVEMENTS RELATING TO TOBACCO-SMOKE FILTERS
1,208,061. Cigarette filter. BRITISHAMERICAN TOBACCO CO. Ltd. 31 Dec., 1968 [3 Jan., 1968], No. 479/68. Heading A2C. A tobacco-smoke filter comprises a mass of fibres and/or filaments of polyurethane material. The filter may also comprise conventional filter material, and additives such as active ch...
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Main Author | |
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Format | Patent |
Language | English |
Published |
07.10.1970
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Subjects | |
Online Access | Get full text |
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Summary: | 1,208,061. Cigarette filter. BRITISHAMERICAN TOBACCO CO. Ltd. 31 Dec., 1968 [3 Jan., 1968], No. 479/68. Heading A2C. A tobacco-smoke filter comprises a mass of fibres and/or filaments of polyurethane material. The filter may also comprise conventional filter material, and additives such as active charcoal, vermiculite, expanded perlite, silica gel, comminuted organic foam material, polyurethane imines and water. The fibres and/or filaments may be bonded together with a bonding agent such as themoplastic or pressure-sensitive synthetic resin or a low-melting point salt. |
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Bibliography: | Application Number: GB19680000479 |