HEAT-TIMER CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F22D PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; FEED-WATER SUPPLY; CONTROLLING WATER LEVEL; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN BOILERS 19
 
  
 
F25B REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS 167
 
  
 
H05B ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR 1110

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8479689 Optimizing multiple boiler plant systems with mixed condensing and non-condensing boilersJun 29, 09Jul 09, 13[F22D]
6026651 Remote controlled defrost sequencerJul 21, 98Feb 22, 00[F25B]
5643482 Snow melt control systemJan 16, 96Jul 01, 97[H05B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2004/0095,237 Electronic message delivery system utilizable in the monitoring and control of remote equipment and method of sameAbandonedSep 16, 03May 20, 04[G08B]
6223543 Effective temperature controller and method of effective temperature controlExpiredJun 17, 99May 01, 01[F25D]
6152376 Valve modulation method and system utilizing sameExpiredJan 25, 99Nov 28, 00[G05D]
5887786 Passive injection system used to establish a secondary system temperature from a primary system at a different temperatureExpiredSep 08, 97Mar 30, 99[F24D]
5042431 Multiple boiler control system and method of operationExpiredApr 09, 90Aug 27, 91[F22B, F22D]
4755730 Variable resistance output motor controllerExpiredDec 04, 87Jul 05, 88[H02P]
4527246 Hot water heating system control deviceExpiredApr 14, 82Jul 02, 85[F24H]
4396148 Heating system control deviceExpiredOct 23, 81Aug 02, 83[F23N, F24D]

Top Inventors for This Owner

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