(under subclass 2) Processes including feeding a substance to the flame additional to the normal fuel and oxidizing material to act as a protective agent or to give the flame some special characteristic.
SEE OR SEARCH CLASS
44, Fuel and Related Compositions,
300+, for a liquid fuel composition that may include a flame modifying additive.
48, Gas: Heating and Illuminating, sub- classes 89+ for a retort generating heating or illuminating gas fed with steam or water, and
204+, for a heating or illuminating gas process involving water or steam.
60, Power Plants, 39.05, for a combustion products generating process involving the addition of steam or water to the combustion products.
126, Stoves and Furnaces,
59.5, for an orchard device generating smoke by combustion.
