US Patent 11938363 Fire-fighting foam composition

A method of fighting a fire includes aerating a firefighting foam composition to form an aerated firefighting foam; administering the aerated firefighting foam to a fire or applying the aerated firefighting foam to a surface of a volatile flammable liquid; wherein: the firefighting foam composition includes a sugar component that includes a monosaccharide sugar and/or a sugar alcohol; an anionic surfactant; a zwitterionic surfactant; an organic solvent including glycol ether and/or glycol solvent; a polysaccharide thickener; and at least about 40 wt. % water; wherein the composition is substantially free of any amine oxide or nonionic surfactants; and the composition is substantially free of fluorinated compounds.