CLARK, THOMAS P

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4289528 Process for beneficiating sulfide oresExpiredNov 13, 79Sep 15, 81[C22B]
4289529 Process for beneficiating sulfide oresExpiredDec 11, 79Sep 15, 81[C22B]
4276081 Process for beneficiating oresExpiredDec 10, 79Jun 30, 81[C22B]
4257881 Process for beneficiating oxide oresExpiredJul 03, 78Mar 24, 81[C22B]
4239529 Process for beneficiating sulfide oresExpiredOct 22, 79Dec 16, 80[C22B]
4229209 Process for beneficiating goldExpiredJan 27, 78Oct 21, 80[C22B]
4205979 Process for beneficiating oxide oresExpiredOct 10, 78Jun 03, 80[C22B]

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