NIPPON TUNGSTEN CO., LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C04B LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS 1058
 
  
 
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 4134
 
  
 
C01B NON-METALLIC ELEMENTS; COMPOUNDS THEREOF376
 
  
 
B26D CUTTING; DETAILS COMMON TO MACHINES FOR SEVERING, e.g. BY CUTTING, PERFORATING, PUNCHING, STAMPING-OUT 235
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM2155
 
  
 
C23C COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 299
 
  
 
H01B CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING, OR DIELECTRIC PROPERTIES 272
 
  
 
B23K SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 192
 
  
 
B26F PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING 115
 
  
 
B28B SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER 127

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9773652 MgO target for sputteringJun 29, 12Sep 26, 17[H01J, C23C, C04B, G11B]
9293154 Substrates for thin-film magnetic heads, magnetic head sliders, and hard disk drive devicesJun 26, 15Mar 22, 16[G11B]
9293155 Substrates for thin-film magnetic heads, magnetic head sliders, and hard disk drive devicesJun 26, 15Mar 22, 16[G11B]
9293156 Substrates for thin-film magnetic heads, magnetic head sliders, and hard disk drive devicesJun 26, 15Mar 22, 16[G11B]
9120704 Dielectric layer for electrostatic chuck and electrostatic chuckOct 15, 13Sep 01, 15[H01L, C04B]
9079800 Composite ceramic body, and component member for semiconductor manufacturing apparatusApr 17, 13Jul 14, 15[B82Y, C04B, H01B]
8758652 Tungsten cathode materialOct 18, 10Jun 24, 14[H01J, H01B]
8486529 Fine metal carbide particles and methods of manufacturing the sameJan 06, 10Jul 16, 13[B32B]
8471169 Electrode for spot weldingJun 06, 07Jun 25, 13[B23K]
8454933 Polycrystalline magnesium oxide (MgO) sintered body and MgO sputtering targetJan 27, 09Jun 04, 13[C23C, C01B, C25B, B28B, C04B, B22F, C01F, C22C]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2014/0017,114 TUNGSTEN CATHODE MATERIALAbandonedMar 22, 12Jan 16, 14[H01B]
2013/0264,314 ELECTRODE FOR ELECTRIC DISCHARGE MACHININGAbandonedOct 17, 11Oct 10, 13[B23H]
2011/0174,125 METHOD OF SHEARING THIN PLATEAbandonedJul 31, 09Jul 21, 11[B21D]
2010/0143,749 SUBSTRATE MATERIAL FOR MAGNETIC HEAD AND METHOD FOR MANUFACTURING THE SAMEAbandonedMar 30, 07Jun 10, 10[C04B, G11B]
2009/0120,155 Shaping Tool and Methods of Using the SameAbandonedMay 26, 06May 14, 09[B21D]
7518137 Shield materialExpiredMar 18, 03Apr 14, 09[G21C]
2009/0068,498 MATERIAL OF CERAMIC SUBSTRATE FOR THIN-FILM MAGNETIC HEADAbandonedApr 07, 06Mar 12, 09[B28B, G11B]
7304105 High-density composite materialExpiredSep 30, 02Dec 04, 07[C08K]
2007/0172,378 Tungsten based sintered compact and method for production thereofAbandonedJan 28, 05Jul 26, 07[C22C]
6551954 WC-base composite ceramic sintered compactExpiredJul 18, 01Apr 22, 03[C04B]
6133182 Alumina base ceramic sintered body and its manufacturing methodExpiredSep 09, 99Oct 17, 00[C04B]
5886269 Substrate and heat sink for a semiconductor and method of manufacturing the sameExpiredFeb 14, 96Mar 23, 99[B22F]
5804797 PTC planar heater and method for adjusting the resistance of the sameExpiredSep 18, 95Sep 08, 98[H05B]
5649571 Sub-nozzle in an air injection type weaving machineExpiredJul 24, 95Jul 22, 97[D03D]
5592647 PTC panel heater with small rush current characteristic and highly heat insulating region corresponding to heater location to prevent local overheatingExpiredApr 08, 93Jan 07, 97[H05B, H01C, F24D]
5545248 Titanium-base hard sintered alloyExpiredFeb 14, 95Aug 13, 96[C22C]
5167697 Substrate material for mounting semiconductor device thereon and manufacturing method thereofExpiredApr 17, 91Dec 01, 92[B22F]
5119863 Water jet nozzle for loomExpiredFeb 22, 90Jun 09, 92[D03D]
5093290 Silicon nitride type sintered bodies and method for producing the sameExpiredMar 02, 90Mar 03, 92[C04B]
4902651 Material for magnetic head substrate memberExpiredMar 03, 87Feb 20, 90[C04B]

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