US PATENT SUBCLASS 34 / 293
.~.~.~.~ With gas or vapor treating

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}
289  DF  .~.~.~ And heating {6}
293.~.~.~.~ With gas or vapor treating

DEFINITION

Classification: 34/293

With gas or vapor treating:

(under subclass 289) Process combined with adding any character of material to or removing any character of material from the gas or vapor derived from the freeze-drying process.

(1) Note. This process could involve filtering, condensation, moisturizing, etc. of the derived gas or vapor.