(under the class definition) Compositions which are gaseous, or processes of making them.
SEE OR SEARCH THIS CLASS, SUBCLASS:
181.5, for gaseous getters for electric lamps, electric space discharge devices and other evacuted or gas or vapor filled containers.
SEE OR SEARCH CLASS
48, Gas: Heating and Illuminating, for processes of, and apparatus for, making producer gas, water-gas or other fuel gases.
75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, 300+, for gaseous compositions used in metallurgical processes.
313, Electric Lamp and Discharge Devices,
567+, for electric lamps and electric space discharge devices (e.g., radio tubes) which have an envelope containing a gas and/or vapor composition.
424, Drug, Bio-Affecting and Body Treating Compositions, appropriate subclass for a gaseous anesthetic composition classified on the basis of the anesthetically active compound.
514, Drug, Bio-Affecting and Body Treating Compositions, appropriate subclasses for a gaseous anesthetic composition classified on the basis of the anesthetically active compound;
789, for a life-supporting gaseous composition, e.g., deep-sea breathing gases, etc.
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,
1+, for continuous gas or vapor phase colloid system (e.g., smoke, fog, aerosol, cloud, mist) or agents for such systems or making or stabilizing such systems or agents, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art; including those instances when a composition would otherwise be proper for this subclass (372) and its indented subclasses.
