US PATENT SUBCLASS 423 / 460
.~.~ Treating carbon

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

414  DF  CARBON OR COMPOUND THEREOF {3}
445 R  DF  .~ Elemental carbon {7}
460.~.~ Treating carbon

DEFINITION

Classification: 423/460

(under subclass 445) Processes wherein carbon in the elemental state is treated to change its characteristics.