WINNCO, LLC

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2008/0135,472 Trickling Filter Wastewater Treatment DeviceAbandonedAug 17, 05Jun 12, 08[B01D]
2007/0068,856 Wastewater treatment apparatusAbandonedDec 13, 05Mar 29, 07[B01D]
2006/0225,330 Visor signAbandonedApr 07, 05Oct 12, 06[G09F]
6974536 Wastewater treatment apparatus including dosing and recirculation chambers within a single tankExpiredJan 21, 03Dec 13, 05[C02F]
2004/0265,061 Subsurface wastewater infiltration systemAbandonedApr 16, 04Dec 30, 04[E02B]
6616832 Multi-layer recirculating filter wastewater treatment apparatusExpiredNov 09, 01Sep 09, 03[B01D]
6132599 Multi-layer recirculating filter wastewater treatment apparatusExpiredMay 10, 99Oct 17, 00[B01D]

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