US PATENT SUBCLASS 210 / 752
.~.~ Plural spaced feedings

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

600  DF  PROCESSES {14}
749  DF  .~ Chemical treatment {8}
752.~.~ Plural spaced feedings

DEFINITION

Classification: 210/752

Plural spaced feedings:

(under subclass 749) Process wherein at a specified interval of time or distance from the addition of the chemical the chemical is again added or a second chemical is added.

SEE OR SEARCH THIS CLASS, SUBCLASS:

199, for apparatus to add treating material spaced along a flow path.

726, for a process of sequential chemical addition including precipitation.