US PATENT SUBCLASS 210 / 700
.~.~.~.~ Nitrogen containing

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

600  DF  PROCESSES {14}
696  DF  .~ Preventing, decreasing, or delaying precipitation, coagulation or flocculation {2}
698  DF  .~.~ Utilizing organic agent {2}
699  DF  .~.~.~ Phosphorus containing {1}
700.~.~.~.~ Nitrogen containing

DEFINITION

Classification: 210/700

Nitrogen containing:

(under subclass 699) Process wherein the organic compound also includes nitrogen.

(1) Note. Search this subclass for a process using aminophosphonic acids to prevent precipitation or agglomeration.