EBARA ENGINEERING SERVICE CO., LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 10124
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 748
 
  
 
F28F DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION 349
 
  
 
C01B NON-METALLIC ELEMENTS; COMPOUNDS THEREOF178
 
  
 
C01G COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F 138
 
  
 
C22B PRODUCTION OR REFINING OF METALS 127
 
  
 
F28B STEAM OR VAPOUR CONDENSERS 17
 
  
 
F28D HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT 144

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9243307 Method and apparatus for removing and recovering copper from copper-containing acidic waste liquid and method for producing copper-containing substanceAug 28, 08Jan 26, 16[C22B, C01G, C02F]
7431834 Waste water and sludge treatment apparatusApr 17, 06Oct 07, 08[C02F]
7427357 Process and apparatus for anaerobic treatment of sulfur compound-containing wastewaterJul 15, 04Sep 23, 08[C02F]
7374682 Method and apparatus for the methane fermentation treatment of wastewater containing sulfur compoundMar 29, 04May 20, 08[C02F]
7318896 Method and apparatus for utilization of recovered magnesium ammonium phosphateJul 13, 04Jan 15, 08[C02F]
6562244 Method and apparatus for disinfecting drainageMar 28, 01May 13, 03[C02F]
6547000 Heat exchange for a film heat exchanger and a method for manufacturing the sameNov 28, 00Apr 15, 03[F28F]
6423205 Electric deionization apparatusOct 27, 00Jul 23, 02[C02F, B01D]
6241010 Heat exchange element and a heat exchanger made up of the sameSep 23, 99Jun 05, 01[F28D, B01D]
6068730 Liquid distributor for evaporatorJul 17, 98May 30, 00[F28F, B01D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7402245 Digested sludge treatment apparatusExpiredJan 19, 06Jul 22, 08[C02F]
7297275 Biomembrane filtration apparatus and methodExpiredNov 27, 02Nov 20, 07[C02F]
7264715 Apparatus for treating organic wastewater and sludgeExpiredApr 17, 03Sep 04, 07[C02F]
7166220 Systems and methods for organic wastewater treatmentExpiredNov 21, 02Jan 23, 07[C02F]
6966974 Process for evaporating a solution and an evaporator for use in the processExpiredMar 31, 00Nov 22, 05[B01D]
6828141 Method for purifying matter contaminated with halogenated organic compoundsExpiredJul 09, 01Dec 07, 04[C12S]
6824685 Method and apparatus for treating waste waterExpiredSep 27, 02Nov 30, 04[C02F]
6793820 Ethylene-vinyl alcohol hollow fiber membranesExpiredJul 19, 01Sep 21, 04[B01D]
6713771 Method and apparatus for electromagnetic irradiation of liquidExpiredNov 26, 02Mar 30, 04[H01J]
6686751 Method and apparatus for detecting negative ion in waterExpiredSep 21, 01Feb 03, 04[C25B, G01N]
6638398 Methods for the evaporation of an aqueous solution containing ammoniaExpiredMay 21, 02Oct 28, 03[C01C, B01D]
6630069 Hollow fiber membrane module of immersing typeExpiredDec 23, 97Oct 07, 03[B01D]
6468486 Process for treating exhaust gases containing nitridesExpiredSep 05, 00Oct 22, 02[C01B]
6386752 Coagulation reaction deviceExpiredMar 26, 01May 14, 02[B01F, C02F, B01D]
6303367 Method for purifying matter contaminated with halogenated organic compoundsExpiredOct 22, 99Oct 16, 01[C12S]

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