US PATENT SUBCLASS 34 / 515
.~.~.~.~ Heat pump or recompression increases heating effect

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

282  DF  PROCESS {24}
443  DF  .~ Gas or vapor contact with treated material {17}
513  DF  .~.~ Heat conserving {1}
514  DF  .~.~.~ Exhaust gas or vapor from treatment zone heats treating gas or vapor {1}
515.~.~.~.~ Heat pump or recompression increases heating effect

DEFINITION

Classification: 34/515

Heat pump or recompression increases heating effect:

(under subclass 514) Process wherein a heat pump or a compressor is used to increase the energy level of the exhausted gas prior to its heat exchange with the treating gas or vapor entering the treating zone.