US PATENT SUBCLASS 34 / 487
.~.~ Gas or vapor flow directing or control

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}
487.~.~ Gas or vapor flow directing or control {3}
488  DF  .~.~.~> Flow direction changes during treatment {1}
491  DF  .~.~.~> Temperature or moisture content of treated material or chamber controls or directs gas or vapor
492  DF  .~.~.~> Gas or vapor flow varied during treatment

DEFINITION

Classification: 34/487

Gas or vapor flow directing or control:

(under subclass 443) Process wherein the location of application of the treating gas or vapor or the quantity of treating gas or vapor is regulated.