NAGAOKA INTERNATIONAL CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
B01D SEPARATION 3131
 
 
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 352
 
 
 
B01J CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 1108
 
 
 
B07B SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, OR SIFTING OR BY USING GAS CURRENTS; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL 120
 
 
 
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
 
 
 
E03B INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER 112
 
 
 
E21B EARTH OR ROCK DRILLING 195

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2017/0107,122 RAW WATER TREATMENT METHODJun 21, 16Apr 20, 17[C02F]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9573082 Upper-layer cleaning device for water treatment device, and method for cleaning water treatment device filter layerJul 05, 12Feb 21, 17[C02F, B01D]
9017559 Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatusJun 15, 10Apr 28, 15[C02F, B01D]
8110116 Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatusMay 19, 09Feb 07, 12[B01D]
6221320 Device and method for holding catalyst in a radial flow reactorNov 03, 93Apr 24, 01[B01J]
5415294 Screen with a surface having projections or depressionsJan 26, 94May 16, 95[B07B]
5307984 Method of manufacturing a selective isolation screenDec 18, 92May 03, 94[B23K, E03B, E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2015/0314,221 CLEANING SYSTEM FOR SAND FILTRATION LAYERAbandonedOct 25, 13Nov 05, 15[B01D]
2013/0068,855 MIXED STREAM NOZZLEAbandonedMar 31, 11Mar 21, 13[B05B]
5858235 Sludge dehydrating press having cylindrical inner screen caseExpiredDec 02, 96Jan 12, 99[B01D]
5787980 Well screen having a uniform outer diameterExpiredNov 28, 94Aug 04, 98[E21B]
5673726 Method for weaving a multi-ply fabric packing with hexagonal cellsExpiredJun 08, 95Oct 07, 97[D03D]
5643458 Sludge dehydrating press and method for treating sludgeExpiredDec 29, 94Jul 01, 97[B01D]
5622625 Method of manufacturing a drumExpiredApr 09, 96Apr 22, 97[B01D]
5618424 Rotary drum type device for separating solid particles from a liquidExpiredApr 21, 95Apr 08, 97[B01D]
5476588 Multi-layer composite screenExpiredFeb 03, 95Dec 19, 95[B01D]
5450898 Gravity enhanced maintenance screenExpiredMay 12, 94Sep 19, 95[E21B]
5377423 Sludge dehydrating press and method for treating sludgeExpiredAug 31, 93Jan 03, 95[F26B]
5355948 Permeable isolation sectioned screenExpiredNov 04, 92Oct 18, 94[E21B]
5355949 Well liner with dual concentric half screensExpiredApr 22, 93Oct 18, 94[E21B]
5311942 Well screen having a protective frame for a horizontal or high-angle wellExpiredJul 30, 92May 17, 94[E21B]
5246158 Method of manufacturing a selective isolation screenExpiredDec 18, 92Sep 21, 93[B23K]
4771829 Well liner with selective isolation screenExpiredDec 30, 87Sep 20, 88[E21B]

Top Inventors for This Owner

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