US PATENT SUBCLASS 122 / 41
.~ Fluid fuel

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

40  DF  FLASHER {1}
41.~ Fluid fuel

DEFINITION

Classification: 122/41

(under subclass 40) Flash boilers heated by fluid fuel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

39, 248 and 250, for progressively heated fluid by a fluid fuel burner.

446, 448.1 and 452, for regulation of boilers.