TOHOKU ELECTRIC POWER CO., INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F02C GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS 851
 
  
 
F01D NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 758
 
  
 
F23R GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS 326
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 3156
 
  
 
B01D SEPARATION 2132
 
  
 
B01J CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 2107
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 253
 
  
 
C04B LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS 266
 
  
 
C08G MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS 2118
 
  
 
F23J REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 215

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2015/0293,264 LIGHTNING-STRIKE ELECTRIC CHARGE ESTIMATION SYSTEM AND METHODNov 14, 13Oct 15, 15[G01R, G01W]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9606554 Voltage adjustment device for power distribution system, voltage adjusting method, and power control systemJul 24, 13Mar 28, 17[H02J, G05F]
9512781 Cooling structure for recovery-type air-cooled gas turbine combustorAug 10, 11Dec 06, 16[F02C, F23R, F01D]
9478986 Load leveling system of power systemAug 17, 12Oct 25, 16[H02J]
9459591 Multipoint simultaneous measurement method and multipoint simultaneous measurement system in electric power station, and internal clock used thereforMay 28, 12Oct 04, 16[H04Q, G04R, G04G]
9303378 Foreign-object offshore processing systemMar 02, 11Apr 05, 16[E03B, E02B]
9284403 Method to produce semi-crystalline polylactidesSep 11, 12Mar 15, 16[C08G]
9255490 Gas turbine and operating method thereofSep 24, 09Feb 09, 16[F02C, F01D]
9239164 Slag monitoring device for coal gasifier and coal gasifierSep 17, 10Jan 19, 16[F23J, C10J, F23N, F27D]
9056946 Method for producing polylactic acidJun 16, 11Jun 16, 15[C08G, C08L]
8997665 Slag-melting burner apparatusOct 05, 09Apr 07, 15[F23J, F27D, F23B, F23D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2011/0318,697 GROUND FLAREAbandonedDec 18, 09Dec 29, 11[F23G]
2010/0047,140 APPARATUS FOR PRODUCING LACTIC ACIDAbandonedOct 27, 09Feb 25, 10[B01J]
2008/0307,704 Coal gasification plant and method for operating the sameAbandonedJun 12, 07Dec 18, 08[C10J]
2004/0250,764 Method and apparatus for production of high purity siliconAbandonedDec 06, 02Dec 16, 04[C23C, C01B]
6612751 Optical repeating device with monitoring functionExpiredMar 29, 00Sep 02, 03[G02B]
6277327 Method for the anticorrosive treatment of waste plastics treating equipmentExpiredJan 29, 99Aug 21, 01[C23C, C23F]
6265853 Power source unit for transferring energy between power sources that power an electric vehicleExpiredNov 05, 98Jul 24, 01[H02M, H02H]
6137391 Flux-controlled type variable transformerExpiredMar 11, 99Oct 24, 00[H01F]
6107532 Process and system for converting plastics waste into oilExpiredApr 09, 98Aug 22, 00[C10L, C07C, B09B]
6066263 Apparatus for converting waste plastic into oilExpiredMar 12, 98May 23, 00[B01J]
5995576 Inhibition of radioactive material deposition in primary coolant structure of nuclear power plantExpiredOct 09, 98Nov 30, 99[G21C]
5956650 Communication system interconnecting telephone line and single-frequency simultaneous transmission/reception radio systemExpiredJul 11, 95Sep 21, 99[H04Q]
5873982 Method and apparatus of discriminating coal speciesExpiredApr 24, 97Feb 23, 99[C10L, C07C, G01N, G03G]
5639645 Recombinant .DELTA.9 desaturase and a gene encoding the sameExpiredSep 20, 94Jun 17, 97[C07H, C12N]
5633862 DTMF signal transmission method in single frequency simultaneous transmitting and receiving system and single frequency simultaneous transmitting and receiving system transceiver capable of transmitting DTMF signalExpiredOct 28, 94May 27, 97[H04B]
5553079 Radio communication apparatus and method for multiplex transmission of voice and data signalsExpiredMar 30, 95Sep 03, 96[H04J]
5534490 (Hg,Cu)Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.y oxide superconductor and method of preparing the sameExpiredJun 23, 94Jul 09, 96[C04B, H01B]
5524274 Transceiver controlled by absence/presence of input signalExpiredApr 13, 94Jun 04, 96[H04B, H04J]
5505827 Method of detecting carbides in alloy steels by electrochemical polarizationExpiredNov 23, 93Apr 09, 96[G01N]
5493698 Radio apparatus for simulataneously transmitting and receiving signals using a simple frequencyExpiredFeb 25, 94Feb 20, 96[H04B]

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