US PATENT SUBCLASS 210 / 720
.~.~.~ Of chromium material
Current as of:
June, 1999
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210 /
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LIQUID PURIFICATION OR SEPARATION
600
DF
PROCESSES
{14}
702
DF
.~ Making an insoluble substance or accreting suspended constituents {14}
719
DF
.~.~ Including chemical reduction {1}
720
.~.~.~ Of chromium material
DEFINITION
Classification: 210/720
Of chromium material:
(under subclass 719) Process wherein the constituent being reduced is chromium.
