RUSKIN COMPANY

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2012/0100,797 Remote zone balancing damper and air flow sensor systemAbandonedOct 25, 10Apr 26, 12[F24F]
2010/0150,544 Iris damperAbandonedDec 16, 08Jun 17, 10[G03B]
2009/0124,191 Stack damperAbandonedNov 09, 07May 14, 09[F24F]
2008/0264,405 Fire damperAbandonedApr 25, 07Oct 30, 08[F23N]
2008/0153,409 STATIC AIR MIXERAbandonedDec 21, 06Jun 26, 08[F24F]
2004/0238,045 Gear Driven Damper with Blades for Sensing Pressure DifferentialAbandonedJun 02, 03Dec 02, 04[F16K]
6126540 Staged power exhaust for HVAC air handling unitsExpiredJul 27, 99Oct 03, 00[F24F]
5887849 Thermal release apparatus for coupling a damper actuator to a damper blade assemblyExpiredNov 26, 96Mar 30, 99[F16K]
5577525 Thermal release apparatus for coupling a damper actuator to a damper blade assemblyExpiredOct 11, 94Nov 26, 96[F16K]
5454757 Interchangeable gears for damper assembliesExpiredOct 24, 94Oct 03, 95[F24F]
4541328 Damper seal apparatusExpiredFeb 06, 84Sep 17, 85[E06B]

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