Qualitrol Corporation

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING370
 
  
 
G01K MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR 145

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7377689 Transformer temperature monitoring and controlAug 31, 05May 27, 08[G01K]
7210497 Pressure relief device with increased flow rateDec 19, 03May 01, 07[F16K]
7111637 Enclosure system for pressure relief deviceDec 19, 03Sep 26, 06[F16K]
5937893 Shield for pressure relief deviceMay 27, 97Aug 17, 99[F16K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2006/0251,147 Transformer temperature monitoring and controlAbandonedSep 01, 05Nov 09, 06[G01K, G01J]
6497248 Pressure relief device with one piece gasketExpiredJan 18, 01Dec 24, 02[F16K, H01F]
2002/0094,702 Mounting adapter for use with a voltage regulator tap position indicatorAbandonedJan 18, 01Jul 18, 02[H05K]
4843187 Gasket assembly and electrical power transformer including the sameExpiredFeb 05, 88Jun 27, 89[F16K, H01F]
4823224 Rapid pressure rise circuitExpiredJan 21, 88Apr 18, 89[H02H]
4775245 Multi-phase electronic temperature controllerExpiredDec 12, 86Oct 04, 88[G01K]
4754405 Tri-phase electronic temperature controllerExpiredFeb 14, 86Jun 28, 88[G01K, G06F]
4745571 Modular electronic temperature controllerExpiredAug 30, 85May 17, 88[G01K, G06F]
4733974 Transformer life consumption indicatorExpiredJul 29, 86Mar 29, 88[G01K]
4717882 Snap over lens assemblyExpiredSep 25, 85Jan 05, 88[H01F, G01D]
4676266 Pressure relief deviceExpiredJan 07, 82Jun 30, 87[F16K]
D287701 Electronic temperature monitorExpiredJun 27, 84Jan 13, 87[]
D282393 Combined pressure relief valve and clampExpiredApr 01, 83Jan 28, 86[]
4431023 Pressure relief deviceExpiredApr 01, 83Feb 14, 84[F16K]
4402209 Liquid level float gauge calibration meansExpiredJun 11, 81Sep 06, 83[G01F]

Top Inventors for This Owner

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