US PATENT SUBCLASS 110 / 262
.~.~ Alternate fuel

Current as of: June, 1999
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110 /   HD   FURNACES

260  DF  INCLUDING FLUID FUEL BURNER {1}
261  DF  .~ Powdered solid fuel {1}
262.~.~ Alternate fuel

DEFINITION

Classification: 110/262

Alternate fuel:

(under subclass 261) Apparatus wherein the apparatus is capable of burning either powdered solid fuel or fluid fuel.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

22, for a boiler which can be alternately heated by solid or fluid fuel, and subclass 211 for a sectional boiler which can be alternately heated by solid or fluid fuel.