DE2118770

• Main Author: TOLMAN, THOMAS WILLIAM CHARLES, EASTLEIGH, HAMPSHIRE (GROSSBRITANNIEN)
• Format: Patent
• Language: English
• Published: 28.06.1979
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CIGARETTES; CIGARS; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING; FIRE-FIGHTING; HUMAN NECESSITIES; INORGANIC CHEMISTRY; LIFE-SAVING; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES; METALLURGY; MOUTHPIECES FOR CIGARS OR CIGARETTES; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SMOKERS' REQUISITES; THEIR RELEVANT APPARATUS; TOBACCO; TOBACCO SMOKE FILTERS; TRANSPORTING

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).