US PATENT SUBCLASS 392 / 451
.~.~.~ With immersion heating element

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~ With immersion heating element {6}
452  DF  .~.~.~.~> With baffle or guard
453  DF  .~.~.~.~> Removably insertable into tubular receptacle in tank
454  DF  .~.~.~.~> Plural heating zones
455  DF  .~.~.~.~> With heating element mounting arrangements
456  DF  .~.~.~.~> With heat exchange fluid
457  DF  .~.~.~.~> With protecting means against galvanic corrosion

DEFINITION

Classification: 392/451

With immersion heating element:

(under subclass 449) Subject matter wherein the heating device includes an electrical resistance heating element which is supported within the liquid to be heated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

322+, for reservoir or tank.

324+, for steam or vapor generator.

401, for line connected closed tank.

497, for details of immersion heater.