Autotrol Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5335267 Apparatus and method for transmitting text data directly to a facsimile machineExpiredAug 28, 92Aug 02, 94[H04M]
5294916 Water treatment controller for an evaporative condenserExpiredJan 23, 92Mar 15, 94[G08B]
5152252 Water treatment control system for a boilerExpiredJan 23, 92Oct 06, 92[F22B]
5058032 Apparatus and method for monitoring a water treatment systemExpiredOct 23, 89Oct 15, 91[G06F]
5014877 Pellet dispenserExpiredOct 30, 89May 14, 91[B65G]
4997347 Peristaltic motorExpiredJan 12, 90Mar 05, 91[F04B]
4937005 Filter assemblyExpiredAug 11, 87Jun 26, 90[B01D]
4772386 Filter with liquid meterExpiredMay 30, 86Sep 20, 88[B01D]
4765965 Mixer charger reaction control system and method of affecting a chemical reactionExpiredAug 29, 84Aug 23, 88[B01F]
4737275 Resin pressure sensor for water treatmentExpiredMar 06, 86Apr 12, 88[B01J]
4729665 Fluid mixer/charger and methodExpiredDec 22, 86Mar 08, 88[B01F]
4716325 Disengageable one-way mechanism for synchronous motorsExpiredNov 06, 86Dec 29, 87[H02K]
4711370 Seal member for pellet dispenserExpiredJul 03, 86Dec 08, 87[B65G]
4688699 Bactericidal mixture control system having flow and dispense duration controls for respective substancesExpiredOct 02, 85Aug 25, 87[B67D]
4687031 Valve control with mechanical memoryExpiredJan 10, 86Aug 18, 87[B65B]
4684063 Particulates generation and removalExpiredAug 29, 84Aug 04, 87[B03C, B05B]
4684254 Fluid mixer/chargerExpiredAug 29, 84Aug 04, 87[B01F]
4676403 Method and circuit for timing chemical dispenser operationExpiredJun 13, 86Jun 30, 87[B67D]
4673527 Tablet granulationExpiredMay 20, 85Jun 16, 87[C02F]
4668386 Water quality monitorExpiredAug 26, 85May 26, 87[B01J]

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