(under subclass 11) Subject matter in which material comprising the in situ formation is disclosed as entering into an exothermic chemical reaction.
(1) Note. The chemical reaction is generally started or sustained by introducing a reactant (e.g., oxygen) from an external source.
SEE OR SEARCH CLASS
166, Wells,
251.1, and 256+ for processes of in situ combustion for the recovery of fluid from the earth which processes might incidentally show boring by in situ combustion.
299, Mining or In Situ Disintegration of Hard Material,
5, for recovering valuable solid material by conversion to the fluid state which includes a chemical reaction, such as combustion.
