(under subclass 304) Apparatus including means to feed a gas into a tank or flow line containing a liquid which is pressurized by the gas, e.g., carbonating means or means to displace liquid by a gas under pressure.
SEE OR SEARCH CLASS
137, Fluid Handling,
154+, for a diverse fluid containing pressure system of a more general application.
261, Gas and Liquid Contact Apparatus,
140, for a refrigerated contact device, and subclass 153 for a heated or cooled gas exposed body of liquid.
