US PATENT SUBCLASS 299 / 15
.~ Forming blocks (e.g., quarrying)

Current as of: June, 1999
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299 /   HD   MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL

10  DF  PROCESSES {7}
15.~ Forming blocks (e.g., quarrying)

DEFINITION

Classification: 299/15

(under subclass 10) Process in which hard material in situ is removed as a relatively large, integral block of a predetermined shape.