US PATENT SUBCLASS 34 / 299
.~.~.~ 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}
298  DF  .~.~ With gas or vapor treating {2}
299.~.~.~ Desiccant or molecular sieve {1}
300  DF  .~.~.~.~> Using filter

DEFINITION

Classification: 34/299

Desiccant or molecular sieve:

(under subclass 298) Apparatus wherein the gas or vapor is subjected to a substance that has a high affinity for water, such as calcium oxide, or a strainer at the molecular level that primarily removes moisture from the gas or vapor by absorption or adsorption.