Ecodyne Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
D315778 Top fitting for a deionizer tankExpiredAug 24, 87Mar 26, 91[]
D310260 Water heaterExpiredJul 13, 87Aug 28, 90[]
D309342 Electronic indicator faucetExpiredAug 08, 86Jul 17, 90[]
4817830 Pressure vessel with a bladderExpiredOct 31, 86Apr 04, 89[B67D]
4606894 Uranium recovery from carbonate leach liquors using carboxylic acid cation exchange resinExpiredAug 19, 83Aug 19, 86[C22B]
4558714 Resin interface detection systemExpiredMay 12, 83Dec 17, 85[F17D]
4458750 Inlet header flow distributionExpiredApr 19, 82Jul 10, 84[F28F]
4414113 Liquid purification using reverse osmosis hollow fibersExpiredSep 29, 82Nov 08, 83[B01D]
4411785 Reverse osmosis hollow fiber filter elementExpiredSep 29, 82Oct 25, 83[B01D]
4405466 Backwash method and apparatusExpiredMay 03, 82Sep 20, 83[B01D]
4392955 Liquid treatment apparatusExpiredDec 26, 79Jul 12, 83[C02B, B01D]
4388417 Regeneration of deep bed condensate polishersExpiredOct 26, 81Jun 14, 83[B01J]
4379855 Method of ion exchange regenerationExpiredJul 01, 81Apr 12, 83[B01J]
4376045 Liquid treatment apparatusExpiredMay 11, 81Mar 08, 83[B01D]
4364794 Liquid concentration apparatusExpiredNov 20, 80Dec 21, 82[B01D]
4293414 Slotted sheet filter elementExpiredNov 07, 79Oct 06, 81[B01D]
4269707 Apparatus and methodExpiredNov 13, 79May 26, 81[B01D]
4267039 Fluid filtration method and apparatusExpiredNov 29, 79May 12, 81[B01D]
4265701 Liquid concentration methodExpiredJan 07, 80May 05, 81[B01D]
4252905 Method of preparing a mixture of ion exchange resinsExpiredJul 06, 79Feb 24, 81[B01J]

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