US PATENT SUBCLASS 250 / 441.11
.~.~ With air lock or evacuation means

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

306  DF  INSPECTION OF SOLIDS OR LIQUIDS BY CHARGED PARTICLES {6}
440.11  DF  .~ Analyte supports {3}
441.11.~.~ With air lock or evacuation means

DEFINITION

Classification: 250/441.11

With air lock or evacuation means:

(under subclass 440.1) Subject matter within a sellable space having an entrance opening with separately operable internal and external doors, or having means to lower the pressure within the space.