US PATENT SUBCLASS 209 / 3
PRECEDENT PREPARATION OF ITEMS OR MATERIALS TO FACILITATE SEPARATION

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

3PRECEDENT PREPARATION OF ITEMS OR MATERIALS TO FACILITATE SEPARATION {2}
3.1  DF  .~> Sorting special items or sorting by methods and apparatus includible in subclasses 509 through 707 {2}
4  DF  .~> Selective differentiation {4}

DEFINITION

Classification: 209/3

(under the class definition) Methods and apparatus including preparation, e.g., treatment of materials or items prior to their separation to facilitate the latter.