US PATENT SUBCLASS 122 / 466
.~.~ Superheater and feed heater

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

459  DF  STEAM TREATMENT {7}
*  DD  .~ Fire tube boiler {3}
466.~.~ Superheater and feed heater

DEFINITION

Classification: 122/466

(under subclass 459) Subject matter comprising fire tube boilers or large flue boilers having both a steam superheater and a feed water heater combined therewith.