(under subclass 592) Process for manufacturing a gas and
water device especially useful for changing matter in its vaporous or gaseous phase to a liquid phase or in its liquid phase to a vaporous or gaseous phase.
(1) Note. This subclass excludes making driers, per se, since the phase change involved is only incidental to the drying use.
(2) Note. Prior to the establishment of this subclass (890.07), this subject matter was indented under "Gas and Water Device Making" (old 29/157+). Other subclasses under Class 29, subclasses 592+ have not been screened for this subject matter.
SEE OR SEARCH THIS CLASS, SUBCLASS:
592.1+, for a method of making an electrical device.
