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ELKEM AS
NO81 patents
Top patents by PatentIndex Score
US4935060AJun 19, 1990
Hydraulic cement slurry
ELKEM AS120 citations92
US5004496AApr 2, 1991
Method and apparatus for treatment of dust recovered from off gases in metallurgical processes
ELKEM AS29 citations91
US5128116AJul 7, 1992
Silicon powder and method for production of silicon powder
ELKEM AS26 citations89
US4986971AJan 22, 1991
Method for production of trichloromonosilane
ELKEM AS23 citations89
US5585080ADec 17, 1996
Method for recovering iron chloride, aluminum chloride and calcium chloride from a leach solution
ELKEM AS20 citations88
US4539194ASep 3, 1985
Method for production of pure silicon
ELKEM AS50 citations88
US5654460AAug 5, 1997
Method for production of aklylhalosilanes
ELKEM AS44 citations87
US7381392B2Jun 3, 2008
Silicon feedstock for solar cells
ELKEM AS17 citations86
US4385935AMay 31, 1983
Method of producing light weight cement for use of cementation of oil and gas wells
ELKEM AS59 citations86
US4722952AFeb 2, 1988
Resin compositions
ELKEM AS35 citations85
US5007480AApr 16, 1991
Use of manganese oxide in drilling mud and oil well cement slurries
ELKEM AS39 citations81
US5094832AMar 10, 1992
Silicon powder and a method for producing silicon powder by gas atomization of silicon
ELKEM AS20 citations78
US4931098AJun 5, 1990
Method for adding silica fume to dry shotcrete mixture
ELKEM AS18 citations77
US5258053ANov 2, 1993
Method for production of granules
ELKEM AS19 citations75
US4337128AJun 29, 1982
Cupric and ferric chloride leach of metal sulphide-containing material
ELKEM AS27 citations75
US7462341B2Dec 9, 2008
Method for production of trichlorosilane and silicon for use in the production of trichlorosilane
ELKEM AS10 citations74
US4752218AJun 21, 1988
Ceramic composite material and a lining for metallurgical smelting furnaces wherein a ceramic composite material is used
ELKEM AS16 citations74
US4663844AMay 12, 1987
Device for cutting an electrode casing
ELKEM AS22 citations74
US4537551AAug 27, 1985
Method and means of charging electrothermic smelting furnaces
ELKEM AS10 citations73
US4435817AMar 6, 1984
Contact assembly
ELKEM AS7 citations73
US4957551ASep 18, 1990
Method for treatment of dust recovered from off gases in metallurgical processes
ELKEM AS14 citations72
US4646317AFeb 24, 1987
Electrode holder system for electrothermic smelting furnaces
ELKEM AS13 citations71
US4543656ASep 24, 1985
Electrode holder system for electrothermic smelting furnaces
ELKEM AS13 citations71
US4481637ANov 6, 1984
Arrangement of electrode holders
ELKEM AS8 citations71
US4435815AMar 6, 1984
Method and apparatus for charging a furnace
ELKEM AS7 citations71
US4424584AJan 3, 1984
Electrode holder assembly for self-baking electrodes
ELKEM AS10 citations71
US4376381AMar 15, 1983
Lock
ELKEM AS15 citations69
US4674728AJun 23, 1987
Sidewall for a metallurgical smelting furnace
ELKEM AS11 citations68
US4577810AMar 25, 1986
Feed device for guiding a rope onto a winding drum
ELKEM AS8 citations68
US4515329AMay 7, 1985
Feed device for guiding a rope onto a winding drum
ELKEM AS14 citations68
US4367215AJan 4, 1983
Method of acid leaching of silicates
ELKEM AS12 citations68
US4465569AAug 14, 1984
Method of producing zinc from chloride solutions which contain chiefly iron, copper and zinc
ELKEM AS7 citations67
US4421616ADec 20, 1983
Method of producing zinc from chloride solutions which contain chiefly iron, copper and zinc
ELKEM AS11 citations67
US5634960AJun 3, 1997
Scrap melting in a submerged arc furnace
ELKEM AS10 citations66
US5651807AJul 29, 1997
Method for treatment of residues from organochlorosilane and/or chlorosilansynthesis
ELKEM AS12 citations65
US4539124ASep 3, 1985
Lubricating system composition for extrusion of polyvinyl chloride resin binder
ELKEM AS14 citations65
US4612151ASep 16, 1986
Method for continuous production of elongated carbon bodies
ELKEM AS14 citations63
US5388317AFeb 14, 1995
Method for reinforcing and repairing equipment parts and components subjected to heavy abrasive wear
ELKEM AS17 citations62
US4443879AApr 17, 1984
Electrothermical furnace
ELKEM AS3 citations62
US4438516AMar 20, 1984
Means for an electrothermal smelting furnace
ELKEM AS5 citations62
US4434496AFeb 28, 1984
Holder assembly for an electrode in an electrothermal smelting furnace
ELKEM AS3 citations62
US4417345ANov 22, 1983
Holder for an electrode
ELKEM AS3 citations62
US4375960AMar 8, 1983
Means for transporting/rotating the pot of a smelting furnace
ELKEM AS5 citations62
US4649807AMar 17, 1987
Method for preventing dust depositions or build-ups in off-gas channels of electrothermal smelting furnaces
ELKEM AS8 citations61
US4480928ANov 6, 1984
Methods of flaw detection in billets
ELKEM AS12 citations59
US4549591AOct 29, 1985
Device for fitting and fixing gripping shoes on vehicle wheels
ELKEM AS8 citations58
US4349060ASep 14, 1982
Means for improving the surface grip of a tire of a vehicle and a method for manufacturing such means
ELKEM AS5 citations58
US4307870ADec 29, 1981
Clutch mechanism for hoisting apparatuses
ELKEM AS4 citations57
US5005768AApr 9, 1991
Spray nozzle
ELKEM AS3 citations56
US4552632ANov 12, 1985
Hydrometallurgical method of extraction of copper from sulphide-containing material
ELKEM AS6 citations56
Showing the top 50 of 81 patents by PatentIndex Score.