Assignee
ENVIREX
US64 patents
Top patents by PatentIndex Score
US5766484AJun 16, 1998
Dissolved gas floatation device
ENVIREX77 citations93
US5242583ASep 7, 1993
Wire screen clamp
ENVIREX31 citations93
US4975197ADec 4, 1990
Orbal wastewater treatment process
ENVIREX60 citations93
US4961854AOct 9, 1990
Activated sludge wastewater treatment process
ENVIREX66 citations93
US5372712ADec 13, 1994
Biomass growth control apparatus for fluid bed biological reactor
ENVIREX33 citations92
US4950398AAug 21, 1990
Cantilevered flight attachment for non-metallic chain
ENVIREX32 citations91
US4631974ADec 30, 1986
Polymeric split sprocket wheel
ENVIREX34 citations91
US4568457AFeb 4, 1986
Staged anaerobic reactor
ENVIREX54 citations91
US4280913AJul 28, 1981
Water purification process
ENVIREX36 citations91
US5415766AMay 16, 1995
Traveling water screen including boot seal
ENVIREX33 citations90
US5326460AJul 5, 1994
Pretensioned mesh insert and method for producing a pretensioned mesh insert
ENVIREX45 citations90
US5222920AJun 29, 1993
Chain including roller sealing arrangement
ENVIREX33 citations90
US4863418ASep 5, 1989
Non-metallic chain including wound composite chain links and molded pins
ENVIREX42 citations90
US4663042AMay 5, 1987
Polymeric sludge collector flight
ENVIREX47 citations90
US5035681AJul 30, 1991
Reduced friction sprocket assembly for use in corrosive environments
ENVIREX25 citations89
US4668387AMay 26, 1987
Deep submergence rotating biological contactor apparatus
ENVIREX57 citations89
US5215616AJun 1, 1993
Method for manufacturing a high strength, non-metallic transmission chain
ENVIREX45 citations88
US4932927AJun 12, 1990
High strength, non-metallic transmission chain
ENVIREX51 citations88
US4555340ANov 26, 1985
Excess overflow orifice tubes
ENVIREX28 citations88
US5425874AJun 20, 1995
Rotating contactor including cross flow media for the biological treatment of waste water
ENVIREX20 citations86
US5489378AFeb 6, 1996
Differential relief mechanism for a traveling water screen
ENVIREX24 citations85
US5326459AJul 5, 1994
Wastewater treatment apparatus
ENVIREX65 citations85
US4563282AJan 7, 1986
Wastewater treatment plant and method
ENVIREX27 citations85
US4038187AJul 26, 1977
Microscreen drum
ENVIREX50 citations85
US4902304AFeb 20, 1990
Separate low pressure gas storage system
ENVIREX41 citations84
US5501793AMar 26, 1996
Traveling water screen including improved basket
ENVIREX33 citations83
US4582601AApr 15, 1986
Polymeric basket frame for a traveling water screen
ENVIREX48 citations83
US4359385ANov 16, 1982
Filter press plate transfer mechanism
ENVIREX21 citations82
US3953555AApr 27, 1976
Diffuser connector for aeration header
ENVIREX51 citations82
US4604206AAug 5, 1986
Staged anaerobic reactor
ENVIREX22 citations81
US5584996ADec 17, 1996
Apparatus and method for distributing liquid containing evolvable glass into a fluidized bed of a reactor
ENVIREX24 citations80
US5534140AJul 9, 1996
Bar screen having compound fine screen bar rack
ENVIREX31 citations80
US4549962AOct 29, 1985
Rotating biological contactor
ENVIREX25 citations78
US5481789AJan 9, 1996
Method for removing a gear or bearing in circular clarifiers and thickeners
ENVIREX11 citations74
US5249597AOct 5, 1993
Digestor tank having a pressure relief valve
ENVIREX11 citations74
US4009106AFeb 22, 1977
Clarifier with overflow scum removal
ENVIREX17 citations74
US5976365ANov 2, 1999
Biomass growth control apparatus for fluid bed biological reactor
ENVIREX14 citations73
US4305821ADec 15, 1981
Doctor blade lifter over belt seam
ENVIREX10 citations73
US4294700AOct 13, 1981
Submerged large diameter seal
ENVIREX8 citations73
US4663038AMay 5, 1987
Side channel clarifier
ENVIREX10 citations72
US5454938AOct 3, 1995
Bed height sensing device for biological reactor
ENVIREX7 citations71
US4620927ANov 4, 1986
Polymeric microscreen support wheel and assembly
ENVIREX10 citations71
US3989627ANov 2, 1976
Removable gas diffuser and apparatus therefor
ENVIREX11 citations71
US4721570AJan 26, 1988
RBC with solids contact zone
ENVIREX21 citations69
US4038185AJul 26, 1977
Scum control system for peripheral feed channel of sedimentation tank
ENVIREX23 citations69
US5766491AJun 16, 1998
Backflow prevention system for media bed reactor
ENVIREX8 citations68
US5250178AOct 5, 1993
Buoyant ceiling wiper for stacked tank clarifier
ENVIREX11 citations67
US5552052ASep 3, 1996
Method of reducing iron fouling in groundwater treatment systems
ENVIREX16 citations66
US5419832AMay 30, 1995
Guide lock for a traveling water screen
ENVIREX14 citations66
US4372895AFeb 8, 1983
Disc for aeration of sewage
ENVIREX11 citations66
Showing the top 50 of 64 patents by PatentIndex Score.