US PATENT SUBCLASS 423 / 447.8
.~.~.~ Controlling varying temperature or plural heating steps


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}
447.8.~.~.~ Controlling varying temperature or plural heating steps


DEFINITION

Classification: 423/447.8

(under subclass 447.1) Processes wherein a carbonizing reaction is carried out by (1) varying the temperature over a given time span or by (2) heating to two or more distinct temperatures.

(1) Note. Heating to cure binder or dry is not considered a carbonizing reaction without positive disclosure that carbonizing occurs under those conditions.

(2) Note. Heating a temperature to cause a change in crystalline form of the carbon (e.g., graphitizing) is considered a step of carbonizing for this subclass.