US PATENT SUBCLASS 210 / 694
.~.~.~.~ Utilizing activated carbon

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
660  DF  .~ Ion exchange or selective sorption {8}
690  DF  .~.~ Sorbing organic constituent {1}
691  DF  .~.~.~ From aqueous material {2}
694.~.~.~.~ Utilizing activated carbon

DEFINITION

Classification: 210/694

Utilizing activated carbon:

(under subclass 691) Process in which the sorbent comprises the element of atomic number 6 in a highly porous state.

(1) Note. The sorbent is also known as charcoal and can be produced by pyrolysis, or carbonizing often with subsequent treatment as by steam or carbon dioxide.