US PATENT SUBCLASS 502 / 436
.~.~.~ Diverse temperatures

Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

400  DF  SOLID SORBENT {6}
416  DF  .~ Free carbon containing {3}
418  DF  .~.~ Process utilizing solid or liquid source carbonizable material, or product thereof {9}
436.~.~.~ Diverse temperatures

DEFINITION

Classification: 502/436

Diverse temperatures:

(under subclass 418) Process in which material is heated at two clearly distinct temperatures or ranges of temperatures.

(1) Note. A process in which material is subjected to heat which may increase or decrease during the treatment does not suffice for placement here. The process must recite two heating stages which differ unequivocally e.g., at 900 deg. and 15000< deg.