BABCOCK-TRANSENVIRO, L.P.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5013441 Biological nutrient removal with sludge bulking control in a batch activated sludge systemExpiredJul 20, 88May 07, 91[C02F]
4891128 Solids excluding surface skimmerExpiredNov 28, 88Jan 02, 90[B01D]
4693821 Weir for waste water treatment systemsExpiredSep 23, 85Sep 15, 87[B01D]
4663044 Biological treatment of wastewaterExpiredSep 13, 85May 05, 87[C02F]

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