US PATENT SUBCLASS 159 / 40
.~.~ Flues in pan

Current as of: June, 1999
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159 /   HD   CONCENTRATING EVAPORATORS

32  DF  OPEN PANS {6}
38  DF  .~ Furnace heated {3}
40.~.~ Flues in pan

DEFINITION

Classification: 159/40

(under subclass 38) Open pans in which conduits are provided communicating with the flue or combustion chamber for carrying the hot gases within the outside dimensions of the pan.

SEE OR SEARCH THIS CLASS, SUBCLASS:

28.1, for heating elements for closed pans.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

44.1+, for heating-tube structure and arrangement.