US PATENT SUBCLASS 159 / 26.1
.~.~ Heated tube

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

22  DF  CLOSED EVAPORATING CHAMBERS {4}
23  DF  .~ Indirectly heated {4}
26.1.~.~ Heated tube {2}
26.2  DF  .~.~.~> Inclined
27.1  DF  .~.~.~> Vertical {4}

DEFINITION

Classification: 159/26.1

Heated tubes:

(under subclass 23) Closed vessels comprising a tube or tubes of heat-conducting material heated on the exterior and through which the liquid undergoing evaporation is passed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

37, for steam-heated open pans.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

235.11+, for water tube boilers.