Nippon Petroleum Refining Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C01B NON-METALLIC ELEMENTS; COMPOUNDS THEREOF475
 
  
 
C10G CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION 458
 
  
 
C09C TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES 327
 
  
 
C10L FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUEFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS 339
 
  
 
H01G CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE 363
 
  
 
C01D COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM 213
 
  
 
C01G COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F 237
 
  
 
C10C WORKING-UP TAR, PITCH, ASPHALT, BITUMEN; PYROLIGNEOUS ACID 29
 
  
 
H01B CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING, OR DIELECTRIC PROPERTIES 272
 
  
 
B01J CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 1108

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8226921 Raw coke for electricity storage carbon material and needle cokeJun 10, 11Jul 24, 12[C01C, C01B, C01G, H01G]
8197788 Raw coke for electricity storage carbon material and needle cokeJun 10, 11Jun 12, 12[C01C, C01B, C10L, C09C, C10G, H01G]
7964173 Feedstock composition and raw coke for electricity storage carbon material and needle cokeDec 27, 06Jun 21, 11[C01B, C10L, C09C, H01B, C10G, C10C, C01D, H01G, C10B]
7959888 Raw coke for electricity storage carbon material and needle cokeDec 27, 06Jun 14, 11[C01B, C10L, C09C, H01B, C10G, C10C, C01D, H01G]
7666306 Adsorbent, method for producing same, and method for processing oil-containing waste waterSep 06, 05Feb 23, 10[C02F]
7112311 Cooling method of hydrotreating plant and cooling unit thereforOct 31, 01Sep 26, 06[B01J]
5543041 Supply system of petroleum heavy oil containing magnetic fine particlesJul 06, 94Aug 06, 96[C01G]
5316658 Process for the production of low-sulfur diesel gas oilJul 15, 92May 31, 94[C10G]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2009/0207,972 Device and Method for Detecting Foreign Matter, and Device and Method for Removing Foreign MatterAbandonedJan 24, 06Aug 20, 09[G01N]
6882517 Raw material composite for carbon material used in electric double layer capacitor, manufacturing method of the same, electric double layer capacitor, and manufacturing method of the sameExpiredDec 01, 03Apr 19, 05[H01G]
5747457 Linear adhesion inhibitorsExpiredOct 27, 94May 05, 98[A61K, C07K]
5647971 Method and apparatus for changing solvent composition in a solvent recovery system of a dewaxing apparatusExpiredAug 23, 94Jul 15, 97[C10G]
5611894 Method and apparatus for changing solvent composition in a solvent recovery system of a dewaxing apparatusExpiredJun 07, 95Mar 18, 97[C10G, B01D]
5381227 Standard materials and methods for instrumental measurement for ASTM color of petroleum products using said standard materialsExpiredMar 18, 93Jan 10, 95[G01J]
5376257 Process for feed oil refining for production of lubricating oilExpiredAug 02, 93Dec 27, 94[C10G]
5139329 Standard samples and methods of instrumental measurement of Saybolt color of petroleum products using said samplesExpiredAug 22, 91Aug 18, 92[G01N]
5139330 Standard samples and methods of instrumental measurement of ASTM color of petroleum products using said samplesExpiredSep 30, 91Aug 18, 92[G01N]
4559007 Fuel burning method in heating furnaceExpiredNov 04, 81Dec 17, 85[F23J]
4313917 Method of defoaming amine solutionsExpiredJun 10, 80Feb 02, 82[B01D]
4305452 Method of pre-heating boiler feed waterExpiredAug 08, 80Dec 15, 81[F28F]
4262843 Method of and apparatus for controlling the feed amount of air for combustion in a natural draft-type heating furnaceExpiredFeb 06, 79Apr 21, 81[F23N]
4220519 Method of suppressing the rise in surface temperature of heating tubes by ammonia injectionExpiredNov 09, 78Sep 02, 80[C10G, C23F]

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