ABB STROMBERG DRIVES OY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
D21C PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR127
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 1205
 
  
 
H02K DYNAMO-ELECTRIC MACHINES 1106
 
  
 
H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF 1101
 
  
 
H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 186

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5521483 Method of determining a residual flux of an inverter-supplied squirrel cage/induction machineFeb 06, 95May 28, 96[H02P]
5491340 Method and apparatus for determination of refiner mechanical pulp propertiesJul 19, 94Feb 13, 96[G01N, D21C]
5301085 Control circuit for a semiconductor switchDec 09, 92Apr 05, 94[H02M]
5149997 Fan for an electrically operated machineJan 03, 92Sep 22, 92[H02K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5371458 Method for determining the stator flux of an asynchronous machineExpiredOct 20, 92Dec 06, 94[G01R]
5309086 Current measuring transducer operating on the compensation principleExpiredMar 25, 93May 03, 94[G01R]
5198742 Method of preventing the stalling of an asynchronous machineExpiredNov 16, 90Mar 30, 93[H02P]
5162727 Method and apparatus of determining the stator flux estimate of an electric machineExpiredDec 07, 90Nov 10, 92[G01L]
4920306 Method for controlling the torque of a synchronous machine supplied by a frequency converterExpiredAug 03, 88Apr 24, 90[H02P]
4918367 Method for controlling the torque of an ac motorExpiredFeb 06, 89Apr 17, 90[H02P]
4895618 Method of controlling alkaline pulping processExpiredMar 23, 89Jan 23, 90[D21C]
4566051 Inverter protected in respect of the rates of increase of current and voltageExpiredApr 17, 84Jan 21, 86[H02H]
4283840 Method for manufacturing a support construction for the winding in an electrical machineExpiredJun 12, 79Aug 18, 81[H02K]

Top Inventors for This Owner

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