US PATENT SUBCLASS 392 / 457
.~.~.~.~ With protecting means against galvanic corrosion

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}
451  DF  .~.~.~ With immersion heating element {6}
457.~.~.~.~ With protecting means against galvanic corrosion

DEFINITION

Classification: 392/457

With protecting means against galvanic corrosion:

(under subclass 451) Subject matter wherein the heating device in-line connected tank includes means to prevent or retard electrochemical corrosion produced when one metal is in electrical contact with another more noble metal, both being in the same corroding medium or electrolyte, with a current between them.

SEE OR SEARCH CLASS

165, Heat Exchange,

134.1, for protector or protective agent.

204, Chemistry: Electrical and Wave Energy,

196.01+, for object protection.

220, Receptacles,

567.3, for hot water boiler type.