WORLD CHEMICAL CO., LTD.

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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 154
 
  
 
E02B HYDRAULIC ENGINEERING 117
 
  
 
F03B MACHINES OR ENGINES FOR LIQUIDS 123
 
  
 
F04D NON-POSITIVE-DISPLACEMENT PUMPS173

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9359229 Device for recovering floating materials on the liquid surfaceMay 22, 14Jun 07, 16[E02B, C02F, B01D]
8512565 Solid-liquid separator with self-priming pumpJan 25, 11Aug 20, 13[B01D]
8257588 Oil-water separator with self-priming pumpFeb 07, 11Sep 04, 12[B01D]
7682129 Filtration device combined with self-priming pumpApr 23, 07Mar 23, 10[F03B]
D450327 PumpApr 28, 00Nov 13, 01[1502]
D383992 Ocean buoyNov 13, 95Sep 23, 97[1005]
5509779 Self-priming chemical pumpJan 30, 95Apr 23, 96[F04D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6887048 Liquid pump and sealing mechanismExpiredMar 06, 03May 03, 05[F04D]
6312228 Recovery pump for recovering floating oilExpiredJan 06, 00Nov 06, 01[F04B]
5954955 Oil-water recovering and separating apparatusExpiredMar 24, 97Sep 21, 99[C02F, B01D]
5366629 Liquid recovering apparatusExpiredMar 18, 93Nov 22, 94[E02B]
5154587 Magnet pumpExpiredSep 12, 90Oct 13, 92[F03B, F04D]
4655681 Seal-less pumpExpiredJun 14, 85Apr 07, 87[F03B, F04D]

Top Inventors for This Owner

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