Sentrachem Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5360898 Production of an organic salt of a rare earth metalExpiredFeb 19, 93Nov 01, 94[C07C]
4904374 Froth flotationExpiredOct 04, 88Feb 27, 90[B03D]
4769324 Ethanol productionExpiredDec 05, 85Sep 06, 88[C12P]
4732666 Froth flotationExpiredOct 16, 86Mar 22, 88[B03D]
4657669 Depressants for froth flotationExpiredJul 19, 85Apr 14, 87[B03D]
4528166 Recovery of gold and/or silver from cyanide leach liquors on activated carbonExpiredMay 05, 83Jul 09, 85[C22B, C01G]
4466547 Disposable flexible containers for baby feeding bottlesExpiredMay 24, 82Aug 21, 84[A61J]

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