GREENHECK FAN CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F04D NON-POSITIVE-DISPLACEMENT PUMPS767
 
  
 
F23L AIR SUPPLY; DRAUGHT-INDUCING; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS 413
 
  
 
B01D SEPARATION 3131
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 254
 
  
 
F24C OTHER DOMESTIC STOVES OR RANGES; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION 231
 
  
 
F24F AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING 243
 
  
 
B05B SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES 163
 
  
 
B08B CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL 157
 
  
 
F01D NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 164
 
  
 
F24H FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, IN GENERAL 126

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2015/0176,603 FAN ASSEMBLYDec 24, 13Jun 25, 15[F04D]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9636722 Exhaust fan assemblyDec 31, 13May 02, 17[F23L, B08B, F04D, F24F]
9505092 Methods for fan assemblies and fan wheel assembliesFeb 25, 13Nov 29, 16[B23P, F04D]
8647182 Exhaust fan assemblyMar 22, 10Feb 11, 14[F23L]
7758305 Centrifugal fan with turbulence inducing inlet bellOct 06, 06Jul 20, 10[F04D]
7682231 Exhaust fan assemblyNov 09, 04Mar 23, 10[F23L]
7547249 Exhaust fan assembly having H-out nozzleJul 14, 05Jun 16, 09[F23L]
7320636 Exhaust fan assembly having flexible couplingDec 03, 04Jan 22, 08[B05B]
7048499 In-line centrifugal fanJun 14, 01May 23, 06[F04D]
6994743 Two stage air filterApr 22, 04Feb 07, 06[B01D]
6797041 Two stage air filterMar 01, 02Sep 28, 04[B01D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2007/0202,795 Induced flow fan with outlet flow measurementAbandonedFeb 24, 06Aug 30, 07[B60H]
7018289 Latch assembly for damperExpiredDec 11, 03Mar 28, 06[F24F]
2005/0204,582 Exhaust fan assemblyAbandonedJan 20, 05Sep 22, 05[F26B]
2005/0159,101 Pivotal direct drive motor for exhaust assemblyAbandonedAug 24, 04Jul 21, 05[F24F]
6644337 Damper assembly having improved strength characteristicsExpiredJun 26, 01Nov 11, 03[F16K]
6505502 Method and apparatus for determining the efficiency of an air preconditioning moduleExpiredNov 01, 01Jan 14, 03[G01M]
5879815 Channel for fire damper assemblyExpiredFeb 14, 97Mar 09, 99[B21C]
5673681 Ventilation system for conveyor ovenExpiredJan 17, 96Oct 07, 97[F24C]
5238453 Integral pivot damper bladeExpiredJan 09, 92Aug 24, 93[F24F]
4508486 Ventilation fan with noise-attenuating housingExpiredMay 28, 82Apr 02, 85[F01D]
4373509 High efficiency ventilation systemExpiredOct 20, 80Feb 15, 83[F23J, F21C]

Top Inventors for This Owner

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