Assignee
DEGREMONT
FR120 patents
Top patents by PatentIndex Score
US4633909AJan 6, 1987
Apparatus for the rapid in-line mixing of two fluids
DEGREMONT93 citations95
US4707252ANov 17, 1987
Fluid bed reactor for the biological treatment of water
DEGREMONT65 citations94
US4482458ANov 13, 1984
Process and apparatus for the anaerobic treatment of waste water in a filter including granular material
DEGREMONT96 citations94
US6277285B1Aug 21, 2001
Process for the clarification of liquids and suspensions
DEGREMONT49 citations92
US6210587B1Apr 3, 2001
Method for the physico-chemical treatment of effluents, in particular of surface water for consumption
DEGREMONT42 citations92
US6210588B1Apr 3, 2001
Method for the physico-chemical treatment of effluents in particular surface water for consumption
DEGREMONT32 citations92
US4869815ASep 26, 1989
Fluidized bed reactor with means for ensuring homogeneous distribution of the fluid to be treated
DEGREMONT40 citations92
US4579655AApr 1, 1986
Apparatus for treating water by flocculation and/or crystalline precipitation, settling and sludge recycling
DEGREMONT40 citations92
US4561974ADec 31, 1985
Apparatus for the anaerobic filtration of waste water
DEGREMONT53 citations91
US4136012AJan 23, 1979
Compact apparatus for the purification of waste water by a physical chemical treatment
DEGREMONT45 citations91
US3956128AMay 11, 1976
Apparatus for treating industrial and domestic waste waters
DEGREMONT92 citations91
US6077430AJun 20, 2000
Method for eliminating phosphorous contained in effluents
DEGREMONT42 citations90
US5503747AApr 2, 1996
Device for treating waste water especially rainwater
DEGREMONT52 citations90
US5096232AMar 17, 1992
Apparatus for the rapid and the air and water tight joining of pipes
DEGREMONT27 citations90
US6337020B1Jan 8, 2002
Method and device for purifying waste water comprising an additional sludge treatment by ozonation
DEGREMONT18 citations89
US5147547ASep 15, 1992
Oxidation and biological reduction reactor, biofiltration method and washing methods used in this reactor
DEGREMONT25 citations89
US6808629B2Oct 26, 2004
Method for effluent purification
DEGREMONT70 citations88
US6024876AFeb 15, 2000
Reactor for biologically removing organic pollutants from water
DEGREMONT30 citations88
US5643453AJul 1, 1997
Process for the treatment of liquid effluents by activated sludge
DEGREMONT25 citations88
US6254778B1Jul 3, 2001
Method for purifying carbon-containing pollution and denitrifying waste water in oxygenic medium
DEGREMONT27 citations87
US4156644AMay 29, 1979
Pulsating sludge bed with inclined plates
DEGREMONT39 citations87
US4142971AMar 6, 1979
Process and system for the dehydration of residues
DEGREMONT43 citations87
US4604197AAug 5, 1986
Submerged filter filled with granular material
DEGREMONT47 citations86
US4435286AMar 6, 1984
Liquid filter device
DEGREMONT30 citations86
US4192742AMar 11, 1980
Process and apparatus for the biological treatment of waste water
DEGREMONT52 citations86
US4216096AAug 5, 1980
Ozone generation device and electrode
DEGREMONT31 citations84
US7651620B2Jan 26, 2010
Pressurised water releasing nozzle for generating microbubbles in a flotation plant
DEGREMONT18 citations83
US7169301B2Jan 30, 2007
Installation for water treatment by flotation
DEGREMONT12 citations83
US6403031B1Jun 11, 2002
Method for mineralization of organic pollutants in water by catalytic ozonization
DEGREMONT31 citations83
US6569336B1May 27, 2003
Method, device and use of said method for biological elimination of metal elements present in an ionized state in water
DEGREMONT35 citations81
US6036867AMar 14, 2000
Method for desalinating and demineralizing solutions containing acids and/or metal salts
DEGREMONT35 citations81
US5498347AMar 12, 1996
Reactor for the ozonization of water
DEGREMONT42 citations81
US4900437AFeb 13, 1990
Device for the introduction of a fluid in a receiving medium, such as that of an apparatus used for the treatment of liquids, notably water
DEGREMONT35 citations81
US5591342AJan 7, 1997
Process for the anaerobic digestion of liquid wastes
DEGREMONT23 citations80
US5196111AMar 23, 1993
Reactor for the biological treatment of sewage
DEGREMONT20 citations80
US4720347AJan 19, 1988
Method and apparatus for the filtration of a suspension by a granular filtrating layer
DEGREMONT30 citations80
US4787978ANov 29, 1988
Method for the purification of waste water, notably of urban waste water
DEGREMONT23 citations79
US4304671ADec 8, 1981
Apparatus and process for separating emulsions by coalescence
DEGREMONT24 citations77
US4925556AMay 15, 1990
Method for the manufacture of floors for filters, and floors thus made
DEGREMONT19 citations75
US7175768B2Feb 13, 2007
Method and device for clarification of liquids, particularly water, loaded with material in suspension
DEGREMONT7 citations73
US5382369AJan 17, 1995
Waste water-treatment process
DEGREMONT18 citations73
US5047149ASep 10, 1991
Apparatus for the clarification of liquids, such as notably water, fruit juices, grape must or similar
DEGREMONT10 citations73
US4623466ANov 18, 1986
Method and apparatus for the counter-current mass exchange between two phases having different densities
DEGREMONT15 citations72
US4338202AJul 6, 1982
Water treatment process and apparatus and device for the distribution of water to be treated into and for the recovery from washing liquid from a water treatment filter apparatus
DEGREMONT18 citations72
US4111802ASep 5, 1978
Water treatment apparatus and method
DEGREMONT15 citations72
US7240440B2Jul 10, 2007
Installation for drying waste, in particular wastewater purifying sludge
DEGREMONT9 citations71
US6162359ADec 19, 2000
Method for recuperating vent gas coming from an ozonization reactor
DEGREMONT12 citations71
US5695655ADec 9, 1997
Longitudinal settler with flow separation
DEGREMONT20 citations71
USD247248SFeb 14, 1978
Diffusion plate for oxygenation treatment of sludge or the like
DEGREMONT15 citations71
US7276165B2Oct 2, 2007
Method and plant for biological treatment of aqueous effluents for purification thereof
DEGREMONT15 citations70
Showing the top 50 of 120 patents by PatentIndex Score.