US PATENT SUBCLASS 392 / 450
.~.~.~ Plural serially connected compartments

Current as of: June, 1999
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392 /   HD   ELECTRIC RESISTANCE HEATING DEVICES

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
441  DF  .~ Tank or container type liquid heater {4}
449  DF  .~.~ Line connected tank {4}
450.~.~.~ Plural serially connected compartments

DEFINITION

Classification: 392/450

Plural serially connected compartments:

(under subclass 449) Subject matter wherein the tank or container structure contains two or more serially interconnected compartments consisting of at least one heating compartment wherein the liquid to be heated is in heat exchange relationship to the heating device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

322+, for reservoir or tank.

325+, for line connected boiler.

SEE OR SEARCH CLASS

220, Receptacles,

500+, for compartmented receptacles.