Teisan Kabushiki Kaisha

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F25J LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT 623
 
  
 
B24B MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING 165

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5803795 Method of treating inner surface of high-pressure gas vesselJul 12, 96Sep 08, 98[B24B]
5778698 Ultra high purity nitrogen and oxygen generator unitNov 22, 96Jul 14, 98[F25J]
5743112 Ultra high purity nitrogen and oxygen generator unitNov 04, 96Apr 28, 98[F25J]
5685169 Method and apparatus for preparing high purity hydrogen bromideMay 06, 96Nov 11, 97[F25J]
5638699 High purity nitrogen gas generatorJul 24, 96Jun 17, 97[F25J]
5373699 Process for the production of nitrogen by cryogenic distillation of atmospheric airOct 08, 93Dec 20, 94[F25J]
5220798 Air separating method using external cold sourceOct 13, 92Jun 22, 93[F25J]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6224677 Gas recovery unit utilizing dual use of gasExpiredJul 12, 96May 01, 01[C23C]
5958138 Gas recovery unitExpiredNov 05, 96Sep 28, 99[C23C]
5937918 Gas filling method and facilityExpiredJul 31, 97Aug 17, 99[F17C]
5921107 Oxygen production method related to a nitrogen generator unitExpiredNov 22, 96Jul 13, 99[F25J]
5899225 Air tube connection state detecting apparatusExpiredDec 24, 97May 04, 99[F01B]
5891404 Exhaust gas treatment unitExpiredOct 15, 96Apr 06, 99[F23D, B01D]
5892207 Heating and cooling apparatus for reaction chamberExpiredNov 27, 96Apr 06, 99[B23K]
5832746 Ultra-high purity nitrogen trifluoride production method, and unit thereforExpiredMay 14, 97Nov 10, 98[F25J]
5806340 High purity nitrogen generator unit and methodExpiredMay 14, 97Sep 15, 98[F25J]
5800792 Exhaust gas treatment unit and methodExpiredJun 04, 96Sep 01, 98[C01B, B01D]
5783162 Argon purification processExpiredAug 30, 96Jul 21, 98[C01B]
5727589 Gas supply system equipped with cylindersExpiredNov 28, 94Mar 17, 98[B08B]
5682761 Ultra-high purity nitrogen generating method and unitExpiredJul 19, 96Nov 04, 97[F25J]
5623960 Solenoid-operated valve for thermally insulated piping and attachment construction thereforExpiredMay 23, 95Apr 29, 97[F16K, F16L]
5557925 Piping installation for low temperature fluidExpiredMay 08, 95Sep 24, 96[F17C]
5546753 Evaporated gas supply methodExpiredDec 22, 94Aug 20, 96[F17C]
5470390 Mixed gas supply system with a backup supply systemExpiredMay 02, 94Nov 28, 95[C23C]
5468937 Impurity removing system for the delivery of high purity gasesExpiredApr 05, 94Nov 21, 95[H05B]
5447285 Safety device for cylinder valve automatic switching unitExpiredMar 21, 94Sep 05, 95[F16K, F15B]
5349822 Method and apparatus for the production of ultra-high purity nitrogenExpiredMar 04, 93Sep 27, 94[F25J]

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