US PATENT SUBCLASS 210 / 139
.~ Of additional fluid

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

138  DF  WITH TIME CONTROL {1}
139.~ Of additional fluid {1}
140  DF  .~.~> Preparation for treating operation

DEFINITION

Classification: 210/139

(under subclass 138) Apparatus which introduces to the treating means a fluid in addition to that being treated.