Filtering material
AssigneesAlfred J. Harendza-Harinxma, Peter J. Catanese, Samuel A. LaPaglia, Deane W. Merry
InventorAlfred J. Harendza-Harinxma
Life of this patent
Estimating the term…
Abstract
A fluid filter, especially useful for cigarettes and the like, comprises cellulose which has been oxidized by an inorganic metal nitrate, such as manganese nitrate. Other constituents, such as activated charcoal, tobacco, powdered pumice and thermoplastics may be added to the oxidized cellulose to modify the filtering action. The filter may also have application in the automobile industry.
Claims4
A method of filtering noxious, carcinogenic or objectionable gases from a mixture of gases comprising the step of passing said mixture of gases through a filter containing the complex metallic product resulting from re-acting cellulose with an inorganic nitrate of the formula Me(NO.sub.3).sub.n where Me represents a metal atom selected from the group consisting of manganese, nickel, aluminum, calcium, iron, sodium, zinc, and copper and n is a number corresponding to the valence number of the metal atom.
Dependencies are inferred from the claim text.