US PATENT SUBCLASS 34 / 288
.~.~.~ And spray freeze or immersion

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

282  DF  PROCESS {24}
284  DF  .~ Freeze-drying {3}
287  DF  .~.~ Including vacuum {2}
288.~.~.~ And spray freeze or immersion

DEFINITION

Classification: 34/288

And spray freeze or immersion:

(under subclass 287) Process involving injecting the material being treated into a chamber subjected to a vacuum, or submerging the material in a cooling fluid also within a chamber subjected to a vacuum.