ROBERTSHAW US HOLDING CORP.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01H ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES 1084
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING964
 
  
 
F23Q IGNITION 413
 
  
 
F23N REGULATING OR CONTROLLING COMBUSTION 318
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 254
 
  
 
F25B REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS 266
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 154
 
  
 
F24H FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, IN GENERAL 126
 
  
 
F25C PRODUCTION, WORKING, STORING OR DISTRIBUTION OF ICE 124
 
  
 
F25D REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS 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
8992211 Hot surface igniter adaptive control methodJun 24, 08Mar 31, 15[F23Q]
7506664 Automotive coolant control valveApr 27, 06Mar 24, 09[F16K, F01P]
7131460 Automotive coolant control valveOct 01, 03Nov 07, 06[F16K]
6994310 Stepper motor driven valve for thermal management and associated method of useNov 03, 03Feb 07, 06[F16K]
6985080 Flame sense circuit and method with analog outputMar 07, 03Jan 10, 06[G08B]
6976505 Valve control system for distributing and regulating the flow of coolantDec 18, 03Dec 20, 05[F16K]
6794771 Fault-tolerant multi-point flame sense circuitJun 20, 02Sep 21, 04[F23Q, H01H]
6688333 Automotive coolant control valveFeb 14, 03Feb 10, 04[F16K]
6681805 Automotive coolant control valveNov 28, 01Jan 27, 04[F16K]
6483052 Electromechanical appliance programmer/timerMar 20, 01Nov 19, 02[H01H]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7544291 Water purification system utilizing a plurality of ultraviolet light emitting diodesExpiredDec 21, 04Jun 09, 09[C02F]
7245475 Wide input voltage range relay drive circuit for universal defrost timerExpiredApr 13, 06Jul 17, 07[H02H]
6923211 Method for distributing and regulating the flow of coolantExpiredDec 18, 03Aug 02, 05[F16K]
6918357 Stepper motor driven fluid valve and associated method of useExpiredAug 22, 03Jul 19, 05[F16K]
6751978 Transition fittingExpiredFeb 22, 02Jun 22, 04[F16L, B67D]
6718838 Rotary drive mechanism and appliance timer/sequence switch utilizing sameExpiredMay 31, 01Apr 13, 04[F16H]
6622503 Evaporator fan control system for a multi-compartment refrigeratorExpiredMar 01, 02Sep 23, 03[F25D]

Top Inventors for This Owner

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