US PATENT SUBCLASS 122 / 23
FLUID FUEL

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

23FLUID FUEL {2}
24  DF  .~> Explosion
*  DD  .~> Plural burner {1}

DEFINITION

Classification: 122/23

(under the class definition) Boilers not otherwise classifiable that are heated by fluid fuel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10, 14, 16-19, 23, 24, 25, 41, 43, 45, 115, 156, 161, 167, 177, 179, 183, 208, 210, 211, 216, 236, 243, 245, 248, 250, 274, 283, 308, 319, 322, 328, 333, 348, 356, 446, 447, 448.1, and 502, for other boilers heated by fluid fuel.