US PATENT SUBCLASS 210 / 722
.~.~.~ Of iron or manganese material
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}
721
DF
.~.~ Including oxidation {1}
722
.~.~.~ Of iron or manganese material
DEFINITION
Classification: 210/722
Of iron or manganese material:
(under subclass 721) Process wherein the constituent being oxidized is iron or manganese.
