FLUID SYSTEMS CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5013448 Process for the preparation of chlorine-resistant polyester semipermeable membranesExpiredFeb 20, 90May 07, 91[B01D]
4919808 Semipermeable membrane compositionsExpiredOct 21, 85Apr 24, 90[B01J]
4830885 Chlorine-resistant semipermeable membranesExpiredJun 08, 87May 16, 89[B05D]
4797185 Hydrogen separation and electricity generation using novel electrolyte membraneExpiredJul 06, 87Jan 10, 89[C25B]
4795536 Hydrogen separation and electricity generation using novel three-component membraneExpiredJul 06, 87Jan 03, 89[C25B]
4792404 Desalination of saline waterExpiredMar 28, 88Dec 20, 88[B01D]
4714482 Thin film polymer blend membranesExpiredJul 11, 85Dec 22, 87[B01D]
4710278 Method and apparatus for separation and purification of hydrogenous compounds with novel membraneExpiredApr 21, 86Dec 01, 87[C25B]
4708981 Water insoluble proton conducting polymersExpiredDec 11, 85Nov 24, 87[C08L]
4705545 Thin film polymer blend membranesExpiredAug 13, 85Nov 10, 87[B01D]
4689122 Gas detection apparatus and method with novel electrolyte membraneExpiredApr 21, 86Aug 25, 87[G01N]
4664761 Electrochemical method and apparatus using proton-conducting polymersExpiredDec 27, 85May 12, 87[C25B, H01M]
4664757 Method and apparatus for gas detection using proton-conducting polymersExpiredDec 27, 85May 12, 87[G01N]
4661254 Chlorine-resistant semipermeable membranesExpiredMay 23, 85Apr 28, 87[B01D]
4636314 Polymer blended membranesExpiredMar 16, 84Jan 13, 87[B01D]
4609468 Increased strength polymer-blended membranesExpiredJun 01, 84Sep 02, 86[B01D]
4500667 Polymer blended membranesExpiredOct 26, 83Feb 19, 85[C08K]
4202520 Modular support assembly for tubesExpiredJul 24, 78May 13, 80[F16L]

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