US PATENT SUBCLASS 210 / 912
.~.~ Heavy metal

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

902  DF  MATERIALS REMOVED {7}
911  DF  .~ Cumulative poison {1}
912.~.~ Heavy metal {2}
913  DF  .~.~.~> Chromium
914  DF  .~.~.~> Mercury

DEFINITION

Classification: 210/912

Heavy metal:

Collection of disclosures under collection 911 in which the material removed is a metal with a density greater than four.