US PATENT SUBCLASS 122 / 468
.~.~.~.~ Superheater

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

459  DF  STEAM TREATMENT {7}
*  DD  .~ Flue boiler {1}
*  DD  .~.~ Vertical {1}
*  DD  .~.~.~ Internal water tube {1}
468.~.~.~.~ Superheater

DEFINITION

Classification: 122/468

(under subclass 459) Subject matter comprising vertical flue boilers having water tubes within the flue, in combination with a steam superheater.