US PATENT SUBCLASS 241 / 24.31
.~.~ Of coal

Current as of: June, 1999
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241 /   HD   SOLID MATERIAL COMMINUTION OR DISINTEGRATION

*  DD  PROCESSES {17}
24.1  DF  .~ With classifying or separating of material {9}
24.31.~.~ Of coal

DEFINITION

Classification: 241/24.31

Of coal:

(under subclass 24.1) Process of comminuting and separating including sorting hard, carbonaceous earthen material.