US PATENT SUBCLASS 219 / 437
.~.~.~.~ Immersible

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
385  DF  .~ Combined with container, enclosure, or support for material to be heated {12}
429  DF  .~.~ With vessel and stand {6}
436  DF  .~.~.~ With heating unit attaching or support means {1}
437.~.~.~.~ Immersible

DEFINITION

Classification: 219/437

(under subclass 436) Subject matter wherein the heating unit is specifically claimed as immersible in the material to be heated within a vessel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

316+, for liquid heaters of the tank type with immersible heating means.

381, for fluid heaters in general with immersible heating unit.

523, for heating devices under the class definition combined with a housing or casing which is immersible within a material or space to be heated.