US PATENT SUBCLASS 126 / 366
.~.~ Closed systems pipes

Current as of: June, 1999
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126 /   HD   STOVES AND FURNACES

344  DF  WATER HEATERS {7}
*  DD  .~ Submerged {3}
366.~.~ Closed systems pipes

DEFINITION

Classification: 126/366

(under subclass 344) Devices comprising steam or hot-water pipes submerged in a closed liquid-heating system and designed to heat the same.

SEE OR SEARCH THIS CLASS, SUBCLASS:

378, for liquid containing vessels heated by a steam or water coil or chamber.

SEE OR SEARCH CLASS

219, Electric Heating,

316+, for similar structure in electric heaters for fluids.