(under subclass 650) Subject matter wherein steam (usually superheated steam) is mixed with the feed or with the reaction effluent for heating or other purposes or wherein elemental oxygen is employed in the reaction.
(1) Note. This subclass does not include indirect heating or cooling where the medium passing through the coil is steam.
(2) Note. The oxygen must react with molecules which supply the atoms of the final product; the mere use of
oxygen-containing gas to burn a fuel, which combustion merely supplies heat to the reaction, is not sufficient for placement of a patent herein.
