molten

Thermite Timeline for Demolition of Structures

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In 1972 Pyronol.RTM. was patented

Google Patents 3695951

"A suitable container may be of the one described in co-application Der. No. 74,434 filed Sept 22, 1970, entitled "Incendiary Torch" by Horace H. Helms, Jr. Alexander G. . . . The material is sealed into said container, which in this case is a torch, is ignited . . . When the pressure inside the container exceeds the strength of the diaphragm the diaphragm fractures and the expanding gases will force the molten material through the nozzle. . . . Alternatively one may add a material to the instant composition which will decompose into a gas or vaporize into a gas when exposed to the heat . . . such as powdered polytetrafluoroethylene (Teflon) or other solid materials."

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In 1989 a patent was given for a device used to demolish submerged platforms.