US PATENT SUBCLASS 110 / 323
.~ Refractory type

Current as of: June, 1999
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110 /   HD   FURNACES

322  DF  BAFFLE OR HEAT RETAINER STRUCTURE {2}
323.~ Refractory type {1}
324  DF  .~.~> Having concavity for engaging pipe exterior {1}

DEFINITION

Classification: 110/323

Refractory type:

(under subclass 322) Structure wherein the baffle or retainer is composed of a ceramic or ceramic-like material which is resistant to high temperatures and large quantities of heat.