ENVIROTECH MOLDED PRODUCTS, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6716347 Wear resistant inserts for filter press platesExpiredJan 16, 02Apr 06, 04[B01D]
6391170 Anode box for electrometallurgical processesExpiredDec 01, 00May 21, 02[C25B]
6231730 Cathode frameExpiredDec 07, 99May 15, 01[C25B]
4964986 Membrane filter plateExpiredMar 02, 90Oct 23, 90[B01D]
4911839 Membrane filter plateExpiredFeb 06, 89Mar 27, 90[B01D]

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