US PATENT SUBCLASS 34 / 294
.~.~.~.~ Desiccant or molecular sieve

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}
294.~.~.~.~ Desiccant or molecular sieve

DEFINITION

Classification: 34/294

Desiccant or molecular sieve:

(under subclass 289) Process wherein the gas or vapor is subjected to a substance that has a high affinity for water, such as calcium oxide, or a straining device at the molecular level that primarily removes moisture from the gas or vapor by absorption or adsorption.