US PATENT SUBCLASS 423 / 449.2
.~.~.~ Treating carbon black

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}
449.1  DF  .~.~ Carbon black (e.g., lampblack) {6}
449.2.~.~.~ Treating carbon black {3}
449.3  DF  .~.~.~.~> Treating with acid, or gas which forms acid in water
449.4  DF  .~.~.~.~> Halogen or compound thereof
449.5  DF  .~.~.~.~> Gaseous oxygen containing compound

DEFINITION

Classification: 423/449.2

Treating carbon black:

(under subclass 449.1) Processes wherein carbon black is treated to change its characteristics.