US PATENT SUBCLASS 423 / 161
.~.~.~ Specified particle size used or made

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

1  DF  TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15}
155  DF  .~ Alkaline earth metal (Mg, Ca, Sr, or Ba) {11}
158  DF  .~.~ Forming insoluble substance in liquid {8}
161.~.~.~ Specified particle size used or made

DEFINITION

Classification: 423/161

(under subclass 158) Processes in which a specific particle size is either employed or formed.

(1) Note. The particle size may be specified in any way, e.g., mesh size, dimension, etc., and may be formed or employed in any process step prior, during or subsequent, to a chemical reaction.