Energy Conservation Partnership, Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5713202 Methods for producing hydro-electric powerExpiredAug 21, 96Feb 03, 98[F04B, F16D]
5551744 Motor vehicle windshield curtain structureExpiredJan 12, 95Sep 03, 96[B60J]
5461858 Method of producing hydroelectric powerExpiredApr 04, 94Oct 31, 95[F16D]
5401480 Removal of sulfur and nitrogen oxides from flue gasesExpiredApr 04, 94Mar 28, 95[C01B]
5384106 Method for removing pollutants from a gas stream using a fractional condensing heat exchangerExpiredApr 04, 94Jan 24, 95[C01B]
5273727 Flue gas purification and production of dry ammonium bisulfites and bisulfatesExpiredJul 16, 91Dec 28, 93[C01C, C01B]
5230870 Method for converting noxious pollutants from flue gas into merchantable by-productsExpiredMay 26, 92Jul 27, 93[C01B]
5198201 Removal of sulphur and nitrogen oxides from flue gasesExpiredJul 16, 91Mar 30, 93[C01B]
5122352 Heat exchanger and pollutant removal systemExpiredAug 14, 90Jun 16, 92[C01C, C01B, F28B]
5061467 Economic recovery and utilization of boiler flue gas pollutantsExpiredJul 06, 90Oct 29, 91[C01B, B01J]
4900403 Recovery of gas dissolved in flue condensateExpiredOct 31, 88Feb 13, 90[B01D]
4876986 Heat regenerator to recover both sensible and heat of condensation of flue gasesExpiredSep 11, 87Oct 31, 89[F28F]
4874585 Economic recovery and utilization of boiler flue gas pollutantsExpiredMar 08, 88Oct 17, 89[B01J]
4813473 Heat regenerator to recover both sensible and heat condensation of flue gasesExpiredMar 28, 88Mar 21, 89[F28D]
4802897 Recovery of gases from non-viscous solventsExpiredAug 05, 86Feb 07, 89[B01D]
4781797 Apparatus for the recovery of gas dissolved in flue condensateExpiredSep 11, 87Nov 01, 88[B01D]
4703794 Heat regenerator to recover both sensible and heat of condensation of flue gasesExpiredJul 15, 86Nov 03, 87[F28D]
4676299 Pollution control and heat recoveryExpiredApr 01, 85Jun 30, 87[F28D]
4597433 Pollution control and heat recoveryExpiredAug 09, 84Jul 01, 86[F28D, F28F]

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