SNYDER GENERAL CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4648854 Variable speed driveExpiredDec 21, 84Mar 10, 87[F16H]
4595402 Suspension system for mounting filter bags in a baghouseExpiredMay 16, 85Jun 17, 86[B01D]
4587403 Thermostat setback controller sub-baseExpiredApr 25, 83May 06, 86[H04Q, H01H]
4576618 Self-cleaning collecting deviceExpiredAug 09, 84Mar 18, 86[B03C]
4560396 Down flow filter panel dust collectorExpiredAug 20, 84Dec 24, 85[B01D]
4557740 Weather louverExpiredSep 10, 84Dec 10, 85[B01D]
4555255 Corner connector clip in an air filter gridExpiredApr 23, 85Nov 26, 85[B01D]
4552058 Air flow control system having minimum variation in volumeExpiredNov 21, 83Nov 12, 85[B64D]
4546818 Multiple source energy recovery systemExpiredOct 28, 82Oct 15, 85[F28F]
4545793 Air filter system with supporting and sealing gridExpiredDec 22, 83Oct 08, 85[B01D]
4526591 Electrode rapping arrangementExpiredDec 13, 82Jul 02, 85[B03C]
4512496 High pressure feedwater heater closure assemblyExpiredAug 02, 84Apr 23, 85[B65D]
4511380 Suspension and sealing of latticework and filtersExpiredDec 15, 83Apr 16, 85[B01D]
4489568 Ground water heat pump systemExpiredApr 13, 84Dec 25, 84[F25B]
4461157 Ground water heat pump system for low yield wellExpiredFeb 03, 82Jul 24, 84[F25B]
4461205 Combination lighting and filtering unit for a clean roomExpiredJul 30, 82Jul 24, 84[F24F, B01D, H01G]
4364749 Method and apparatus for sealing the inlet of a filter compartment to isolate the compartment within a baghouse installationExpiredOct 09, 81Dec 21, 82[B01D]
4363218 Heat pump using solar and outdoor air heat sourcesExpiredApr 10, 81Dec 14, 82[G05D, F25B]
4356703 Refrigeration defrost controlExpiredJul 31, 80Nov 02, 82[F25B, F25D]
4356011 Pocket filter assemblyExpiredMay 26, 81Oct 26, 82[B01D]

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