ENVIROTECH PUMPSYSTEMS, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F04D NON-POSITIVE-DISPLACEMENT PUMPS965
 
  
 
B02C CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN 134
 
  
 
B03B SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS 18
 
  
 
F01D NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 164
 
  
 
F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS 161
 
  
 
F15C FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES 111
 
  
 
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME 158

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9719516 Pressure reducing rotor assembly for a pumpJun 12, 15Aug 01, 17[F04D, F01D]
7988408 Two-piece bearing housing for a centrifugal pumpMay 05, 08Aug 02, 11[F04D]
7168915 Apparatus for axial adjustment of chopper pump clearancesJul 20, 04Jan 30, 07[F04D]
6817845 Centrifugal pump with switched reluctance motor driveApr 19, 02Nov 16, 04[F04B]
6505743 Unitarily-formed grit classifier tank and bearingAug 31, 00Jan 14, 03[B03B]
6431828 Non-planar rotor cover for a centrifugal pumpApr 05, 00Aug 13, 02[F04D]
5975840 Pitot tube pump having axial-stabilizing constructionOct 29, 97Nov 02, 99[F04D]
5871304 Precast prerotation basin systemApr 25, 97Feb 16, 99[F15C]
5472148 Grinding mill, lining and associated method of manufactureNov 30, 93Dec 05, 95[B02C]
5427500 Slurry pump seal systemMar 15, 94Jun 27, 95[F04D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2012/0080,852 Seal Cartridge For A Centrifugal PumpAbandonedSep 30, 11Apr 05, 12[F16J]
2012/0014,783 Apparatus For Non-Clogging PumpsAbandonedJul 18, 11Jan 19, 12[F16K, F04D, F01D]
2011/0280,714 Two-Piece Bearing Housing For A Centrifugal PumpAbandonedJul 22, 11Nov 17, 11[F01D]
2010/0313,972 Check Valve For A Self-Priming PumpAbandonedAug 23, 10Dec 16, 10[F16K]
7784489 Check valve for a self-priming pumpExpiredAug 09, 06Aug 31, 10[F16K]
2009/0232,639 Wear plate for a centrifugal pumpAbandonedSep 04, 08Sep 17, 09[F04D]
7584916 Cutting ring element for a centrifugal chopper pumpExpiredMay 25, 05Sep 08, 09[B02B, B02C, B07B]
7455251 Pump impeller and chopper plate for a centrifugal pumpExpiredOct 11, 06Nov 25, 08[B02C]
7234657 Pump impeller and chopper plate for a centrifugal pumpExpiredJul 14, 06Jun 26, 07[B02B]
2007/0125,893 Cutting ring element for a centrifugal chopper pumpAbandonedJan 30, 07Jun 07, 07[B02C]
2007/0071,619 Fill port for a self-priming centrifugal pump, with safety deviceAbandonedAug 09, 06Mar 29, 07[F04B]
2007/0036,643 Tool-free adjustable clean out assembly for a pumpAbandonedAug 08, 06Feb 15, 07[F01D]
2007/0036,660 Low-profile impeller boltAbandonedAug 07, 06Feb 15, 07[F04D]
7121794 Component assembly for reconfiguring a centrifugal pumpExpiredJun 01, 04Oct 17, 06[F04D]
7118327 Impeller and cutting elements for centrifugal chopper pumpsExpiredJul 16, 04Oct 10, 06[F04D]
7114925 Impeller vane configuration for a centrifugal pumpExpiredJun 30, 04Oct 03, 06[F04D]
2006/0198,731 Wear ring for a centrifugal pitot tube pumpAbandonedMar 02, 06Sep 07, 06[F04D]
7080797 Pump impeller and chopper plate for a centrifugal pumpExpiredJun 25, 04Jul 25, 06[B02C]
6986644 Hard material impeller and methods and apparatus for constructionExpiredMay 02, 03Jan 17, 06[B63H]
6921245 Coaxial seal for a pumpExpiredFeb 11, 03Jul 26, 05[F01D]

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