Assignee
ASARCO INC
US55 patents
Top patents by PatentIndex Score
US4629516ADec 16, 1986
Process for strengthening lead-antimony alloys
ASARCO INC37 citations92
US4789445ADec 6, 1988
Method for the electrodeposition of metals
ASARCO INC54 citations91
US5614038AMar 25, 1997
Method for making machinable lead-free copper alloys with additive
ASARCO INC20 citations89
US5935409AAug 10, 1999
Fluoboric acid control in a ferric fluoborate hydrometallurgical process for recovering metals
ASARCO INC23 citations83
US5849172ADec 15, 1998
Copper solvent extraction and electrowinning process
ASARCO INC45 citations83
US5540749AJul 30, 1996
Production of spherical bismuth shot
ASARCO INC21 citations83
US6192969B1Feb 27, 2001
Casting of high purity oxygen free copper
ASARCO INC40 citations82
US4753688AJun 28, 1988
Process for strengthening lead-antimony alloys
ASARCO INC16 citations82
US5279644AJan 18, 1994
Fire refining precious metals asay method
ASARCO INC32 citations81
US4336237AJun 22, 1982
Removal of mercury from sulfuric acid
ASARCO INC21 citations77
US4337083AJun 29, 1982
Non-polluting, cooling method and heat recuperative sintering method
ASARCO INC22 citations74
US4511443AApr 16, 1985
Method of thiourea addition to electrolytic solutions useful for copper refining
ASARCO INC8 citations71
US4474649AOct 2, 1984
Method of thiourea addition of electrolytic solutions useful for copper refining
ASARCO INC8 citations71
US3959451AMay 25, 1976
Recovery of sulfur dioxide from gas mixtures
ASARCO INC9 citations71
US5850034ADec 15, 1998
Making of metal products using a gas analyzer
ASARCO INC14 citations70
US5110353AMay 5, 1992
Process for the recovery and separation of arsenic from antimony
ASARCO INC11 citations70
US4808221AFeb 28, 1989
Process for the recovery and separation of arsenic from antimony
ASARCO INC10 citations70
US5762683AJun 9, 1998
Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals
ASARCO INC11 citations68
US4489109ADec 18, 1984
Process for applying latex rubber coatings to asbestos-cement products
ASARCO INC14 citations68
US4039323AAug 2, 1977
Process for the recovery of bismuth
ASARCO INC7 citations67
US5133948AJul 28, 1992
Process for the removal of bismuth from copper refining electrolyte by using lead oxide
ASARCO INC16 citations66
US4536152AAug 20, 1985
High-velocity gas burners
ASARCO INC17 citations66
US4501412AFeb 26, 1985
Non-polluting heat recuperative sintering method and apparatus
ASARCO INC10 citations66
US4027001AMay 31, 1977
Process for recovering sulfur from sulfur dioxide
ASARCO INC12 citations66
US6153082ANov 28, 2000
Copper cathode starting sheets
ASARCO INC10 citations65
US5242571ASep 7, 1993
Method and apparatus for the electrolytic production of copper wire
ASARCO INC13 citations65
US4239081ADec 16, 1980
Side dam apparatus for use in twin-belt continuous casting machines
ASARCO INC12 citations65
US4033761AJul 5, 1977
Process for the separation of copper sulfide from metallic lead entrained in a dross
ASARCO INC12 citations65
US3969202AJul 13, 1976
Process for the recovery of antimony values from ores containing sulfo-antimony compounds of copper, and arsenic
ASARCO INC13 citations65
US3941609AMar 2, 1976
Zinc dust, its preparation, and apparatus for preparing same
ASARCO INC17 citations65
US4891061AJan 2, 1990
Process for treating speiss
ASARCO INC8 citations64
US5293924AMar 15, 1994
Manufacture of copper rod
ASARCO INC14 citations63
US4260008AApr 7, 1981
Side dam apparatus for use in twin-belt continuous casting machines
ASARCO INC11 citations62
US5793637AAug 11, 1998
Method and apparatus for banding copper cathodes
ASARCO INC11 citations60
US4902191AFeb 20, 1990
Pail lifter
ASARCO INC15 citations60
US3980759ASep 14, 1976
Recovery of sulfur dioxide from gas mixtures
ASARCO INC5 citations60
US3980760ASep 14, 1976
Recovery of sulfur dioxide from gas mixtures
ASARCO INC5 citations60
US5103892AApr 14, 1992
Continuous casting of discrete shapes
ASARCO INC8 citations58
US4333762AJun 8, 1982
Low temperature, non-SO2 polluting, kettle process for the separation of antimony values from material containing sulfo-antimony compounds of copper
ASARCO INC3 citations58
US4588625AMay 13, 1986
Latex rubber coated asbestos-cement products
ASARCO INC2 citations57
US4521247AJun 4, 1985
Low temperature, non-SO2 polluting, kettle process for separation of lead from lead sulfide-containing material
ASARCO INC2 citations57
US4333763AJun 8, 1982
Low temperature, non-SO2 polluting, kettle process for separation of lead from lead sulfide-containing material
ASARCO INC6 citations57
US4039322AAug 2, 1977
Method for the concentration of alkaline bismuthide in a material also containing molten lead
ASARCO INC4 citations56
US5961797AOct 5, 1999
Copper cathode starting sheets
ASARCO INC4 citations54
US4722831AFeb 2, 1988
Process for purifying silver refinery slimes
ASARCO INC4 citations54
US5240494AAug 31, 1993
Method for melting copper
ASARCO INC6 citations53
US4248953AFeb 3, 1981
Process for the production of photoconductive zinc oxide of improved electrophotographic properties, and product thereof
ASARCO INC2 citations53
US4404026ASep 13, 1983
Process for separation of dross elements combining sodium addition to molten bullion followed by controlled solidification of casting
ASARCO INC6 citations52
US4985216AJan 15, 1991
Reduction roasting of metal ores
ASARCO INC3 citations49
US5234492AAug 10, 1993
Refining of bismuth
ASARCO INC6 citations46
Showing the top 50 of 55 patents by PatentIndex Score.