US PATENT SUBCLASS 23 / 305 RE
.~.~.~ Rare earth compounds

Current as of: June, 1999
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23 /   HD   CHEMISTRY: PHYSICAL PROCESSES

293 R  DF  PHYSICAL PROCESSES {7}
295 R  DF  .~ Crystallization {8}
305 R  DF  .~.~ Heavy metal or aluminum compounds {3}
305 RE.~.~.~ Rare earth compounds

Unofficial Alpha Subclasses: R A F RE

DEFINITION

Classification: 23/305

(under subclass 295) Processes in which the substance being crystallized is a compound of a heavy metal or aluminum.