DefinitionThis class relates only to gas for heating and illuminating purposes and includes apparatus, processes, and compositions for the manufacture of such gas and means for the purification, distribution, and storage thereof. (1) Note. Every plant for producing gas from the combustion of fuel necessitates the use of a furnace of some sort, and where the invention alleged includes more than the furnace and extends into apparatus for treating the gases or modifications of the furnace, adapting it to treat them, the application belongs in Class 48, whether the furnace, per se, be a limekiln or a smelting-furnace. In either case the furnace is merely an element of the plant and if divided out may be sent to its proper class. |
Lines with other classes and within this classThis class does not include the manufacture of gas--such as, for example, oxygen, ozone, nitrous oxide, carbonic-acid gas, and chemical gases in general. These are not heating or illuminating gases. Gases consisting of a single "pure" carbon compound and a process for synthesizing such a compound where the intent is to recover the compound, per se, are in Class 260, Chemistry of Carbon Compounds, its daughter Classes 530-570, or Class 585, Chemistry of Hydrocarbon Compounds. This class does not include charging and discharging devices for retorts, nor does it include charging devices for cupola-generators, such as the well-known bell-and-hopper type. For these two classes of inventions see Class 202, Distillation: Apparatus, and Class 266, Metallurigical Apparatus, respectively, and Class 414, Material or Article Handling, subclasses 147+. This class does not provide for the destruction of gaseous hazardous or toxic waste. See Class 423, Chemistry of Inorganic Compounds, subclasses 210-215.5 for the chemical destruction of gaseous hazardous or toxic waste. Note that subclasses 245.1-245.3 provide for an organic component. |
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