US PATENT SUBCLASS 422 / 33
.~.~ With positive pressure or vacuum

Current as of: June, 1999
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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

1  DF  PROCESS DISINFECTING, PRESERVING, DEODORIZING, OR STERILIZING {15}
28  DF  .~ Using disinfecting or sterilizing substance {9}
33.~.~ With positive pressure or vacuum

DEFINITION

Classification: 422/33

With positive pressure or vacuum:

(under subclass 28) Process including a step of placing the material or article under pressure either below or above the ambient pressure.