US PATENT SUBCLASS 126 / 618
.~.~ Phase change

Current as of: June, 1999
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126 /   HD   STOVES AND FURNACES

569  DF  SOLAR HEAT COLLECTOR {18}
617  DF  .~ With heat storage mass {3}
618.~.~ Phase change

DEFINITION

Classification: 126/618

Phase change:

(under subclass 617) Apparatus wherein the material undergoes change in state from solid to liquid or from liquid to solid. [figure] [caption]A thermal energy storage system comprising a germanium phase change material and a graphite container.