Group by: Item Type | No Grouping Jump to: Patent Number of items: 3. PatentCouncil of Scientific and Industrial Research (1958) Electrowinning of antimony. 59978. Council of Scientific and Industrial Research (1958) Electrolytic separation of pure lead from hgih antimony lead alloys. 59712. Council of Scientific and Industrial Research (1957) Electrowinning of lead from lead sulphate. 59250. |