US PATENT SUBCLASS 165 / 104.17
.~.~ Utilizing change of state

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

104.11  DF  INTERMEDIATE FLUENT HEAT EXCHANGE MATERIAL RECEIVING AND DISCHARGING HEAT {5}
104.15  DF  .~ Solid fluent heat exchange material {3}
104.17.~.~ Utilizing change of state

DEFINITION

Classification: 165/104.17

Utilizing change of state:

(under subclass 104.15) Apparatus wherein the heat of fusion or the heat of vaporization of the retained body of material is intentionally used to assist in heat storage or in heat transportation.