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AssigneePhilip Morris Incorporated
InventorsSeetharama C. Deevi, Sarojini Deevi, Mohammad R. Hajaligol, Harry V. Lanzillotti, Arnys C. Lilly, Jr., D. Bruce Losee, Michael L. Watkins
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This invention relates to improved methods for making a composite heat source comprising carbon and metal species. The composite heat source made by the methods of this invention have ignition temperatures that are substantially lower than carbonaceous heat sources, while at the same time provide sufficient heat to release a flavored aerosol from a flavor bed for inhalation by the smoker. Upon combustion, the heat source produces substantially no carbon monoxide. The metal species may be prepared by mixing a metal oxide, metal and a carbon source, pre-forming the metal oxide/metal/carbon source mixture into a shape and converting the mixture to metal species in situ, without substantially altering the original shape of the mixture.
A combustion heat source for use in a smoking article comprising low valency metal oxide, metal and metal carbide, wherein the low velency metal oxide includes wustite FeO in a quantity sufficient so that substantially all carbon monoxide produced during combustion of the heat source is converted to carbon dioxide.
A combustion heat source for use in a smoking article comprising metal carbide, metal, low valency metal oxide and carbon, wherein the low valency metal oxide includes wustite FeO in a quantity sufficient so that substantially all carbon monoxide produced during combustion of the heat source is converted to carbon dioxide.
A smoking article comprising a combustion heat source, wherein the combustion heat source comprises metal, metal carbide, and wustite FeO in a quantity sufficient so that substantially all carbon monoxide produced during combustion of the heat source is converted to carbon dioxide.
Dependencies are inferred from the claim text.