Envirex Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B65G TRANSPORT OR STORAGE DEVICES, e.g. CONVEYERS FOR LOADING OR TIPPING; SHOP CONVEYER SYSTEMS; PNEUMATIC TUBE CONVEYERS 166
 
  
 
B65H HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES178

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5215616 Method for manufacturing a high strength, non-metallic transmission chainMar 11, 92Jun 01, 93[B65H]
5165522 Collector flight attachment link for collector apparatusMay 28, 91Nov 24, 92[B65G]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5552052 Method of reducing iron fouling in groundwater treatment systemsExpiredDec 09, 94Sep 03, 96[C02F]
5534140 Bar screen having compound fine screen bar rackExpiredMar 17, 94Jul 09, 96[B01D]
5489378 Differential relief mechanism for a traveling water screenExpiredDec 06, 93Feb 06, 96[B01D]
5481789 Method for removing a gear or bearing in circular clarifiers and thickenersExpiredFeb 28, 94Jan 09, 96[B23P]
5425874 Rotating contactor including cross flow media for the biological treatment of waste waterExpiredJun 09, 94Jun 20, 95[C02F]
5423980 Wastewater treatment apparatus with ice resistant adjustable friction driveExpiredJan 18, 94Jun 13, 95[B01D]
5419832 Guide lock for a traveling water screenExpiredNov 30, 93May 30, 95[B01D]
5411660 Apparatus for dissolving gas in liquid including pressurized bubble contactor in sidestreamExpiredNov 06, 92May 02, 95[C02F]
5343908 Vaporless liquid containment systemExpiredSep 09, 93Sep 06, 94[B65B]
5326459 Wastewater treatment apparatusExpiredNov 12, 92Jul 05, 94[C02F]
5326460 Pretensioned mesh insert and method for producing a pretensioned mesh insertExpiredFeb 10, 93Jul 05, 94[B01D]
5296200 Apparatus for venting excess gas bubbles from a bubble contactorExpiredNov 06, 92Mar 22, 94[B01J]
5296201 Apparatus for venting a pressurized bubble contactorExpiredNov 06, 92Mar 22, 94[B01J]
5255722 Vaporless liquid containment systemExpiredMar 12, 92Oct 26, 93[B65B]
5249597 Digestor tank having a pressure relief valveExpiredOct 08, 92Oct 05, 93[F16K]
5250178 Buoyant ceiling wiper for stacked tank clarifierExpiredJun 11, 92Oct 05, 93[B07D]
5242583 Wire screen clampExpiredAug 03, 92Sep 07, 93[B01D]
5131890 Reduced friction spool bearing and method of making sameExpiredOct 01, 91Jul 21, 92[F16H]
5080852 Method of making a bearing sleeve for a split sprocket wheel assemblyExpiredApr 12, 91Jan 14, 92[B29C]
5035681 Reduced friction sprocket assembly for use in corrosive environmentsExpiredJul 11, 90Jul 30, 91[F16H]

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