US PATENT SUBCLASS 23 / 299
.~.~ With extraction

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}
299.~.~ With extraction

DEFINITION

Classification: 23/299

(under subclass 295) Processes combined with a step of physical extraction or dissolving, before or after crystallization.

SEE OR SEARCH CLASS

423, Chemistry of Inorganic Compounds, appropriate subclasses for extracting, leaching or dissolving, per se.