Kool-Fire Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4995241 High efficiency heat exchangerExpiredSep 13, 89Feb 26, 91[F25B]
4825664 High efficiency heat exchangerExpiredMar 21, 88May 02, 89[F25B]
4461345 Heat-augmented heat exchanger systemExpiredJan 18, 82Jul 24, 84[F28B]
4458665 Heat exchanger with baffle platesExpiredMay 04, 81Jul 10, 84[F25B]
4442890 Heat exchanger housing with fan operated doorExpiredJun 03, 81Apr 17, 84[F28F]
4441546 Method of operating a heat-augmented heat pump systemExpiredApr 30, 81Apr 10, 84[F25B]
4429734 Heat exchanger coilExpiredMay 04, 81Feb 07, 84[F28F]
4420034 Heat-augmented heat exchangerExpiredApr 30, 81Dec 13, 83[F25B]
4415023 Heat exchanger housing with air deflecting baffle and hinge doorExpiredJun 03, 81Nov 15, 83[F24H, F28F]
4311191 Heat-augmented heat exchangerExpiredJul 03, 79Jan 19, 82[F25B]
4311192 Heat-augmented heat exchangerExpiredOct 22, 79Jan 19, 82[F25B]

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