Method for improving the heap biooxidation rate of refractory sulfide ore particles that… Grant US-6086656-A United States of America 11 Jul 2000
Method for improving the heap biooxidation rate of refractory sulfide ore particles that… Grant US-5779762-A United States of America 14 Jul 1998
Method for improving the heap biooxidation rate of refractory sulfide ore particles that… Grant US-5688304-A United States of America 18 Nov 1997