US PATENT SUBCLASS 126 / 678
.~ Particular fluent medium including radiation absorbing material

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

569  DF  SOLAR HEAT COLLECTOR {18}
678.~ Particular fluent medium including radiation absorbing material {1}
679  DF  .~.~> Specific chemical

DEFINITION

Classification: 126/678

Particular fluent medium including radiation absorbing material:

(under subclass 569) Apparatus wherein significance is attributed to the material forming the fluent medium and especially to properties of the material which enhance heat transfer.