US PATENT SUBCLASS 122 / 408.2
.~.~ With internal geyser tube

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

406.1  DF  CIRCULATION {7}
408.1  DF  .~ Having internal conduit {2}
408.2.~.~ With internal geyser tube

DEFINITION

Classification: 122/408.2

With internal geyser tube:

(under subclass 408.1) Devices wherein a conduit is placed

such that heated fluid at a low level is transported rapidly to a higher level.