US PATENT SUBCLASS 423 / 447.9
.~.~.~ Carbonizing cellulosic material

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}
447.1  DF  .~.~ Fiber, fabric, or textile {7}
447.9.~.~.~ Carbonizing cellulosic material

DEFINITION

Classification: 423/447.9

(under subclass 447.1) Processes wherein the material carbonized is natural cellulose or its derivatives (e.g., esters, ether, regenerated cellulose, etc.).