US PATENT SUBCLASS 165 / 231
.~.~ Congealed material (e.g., frost, etc.) or condensation removal or prevention

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

200  DF  WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL {14}
201  DF  .~ Having heating and cooling capability {13}
231.~.~ Congealed material (e.g., frost, etc.) or condensation removal or prevention {2}
232  DF  .~.~.~> Operated by timer or programmer
233  DF  .~.~.~> Operated by temperature sensor

DEFINITION

Classification: 165/231

Congealed material (e.g., frost, etc.) or condensation removal or prevention:

(under subclass 201) Subject matter including a first means

responsive to accumulation of congealed material on a surface of the system or on another surface of the heated or cooled area to eliminate such material; or a second means to inhibit freezing or condensation of moisture on said surfaces.

SEE OR SEARCH CLASS

62, Refrigeration,

80, 82 for refrigeration system having defrosting or frost inhibiting mechanism; subclasses 150 through 156 for refrigeration system having means for preventing, removing, or handling atmospheric condensate.