US PATENT SUBCLASS 210 / 719
.~.~ Including chemical reduction

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

600  DF  PROCESSES {14}
702  DF  .~ Making an insoluble substance or accreting suspended constituents {14}
719.~.~ Including chemical reduction {1}
720  DF  .~.~.~> Of chromium material

DEFINITION

Classification: 210/719

Including chemical reduction:

(under subclass 702) Process which include a step of chemical reducing a constituent of the liquid.