Inventor
BECKSTEAD LEO W
US22 patents
Patents
22 patentsUS4443415AApr 17, 1984
Recovery of V2 O5 and nickel values from petroleum coke
AMAX INC68 citations95
US4900522AFeb 13, 1990
Separation of nickel and cobalt from sulfate solutions by solvent extraction
AMAX INC50 citations92
US4551314ANov 5, 1985
Process for improving solvent extraction operation using two mixers
AMAX INC27 citations90
US4450144AMay 22, 1984
Ammonium hydroxide stripping of tungsten from organic solvents
AMAX INC15 citations73
US4397821AAug 9, 1983
Precipitation of synthetic scheelite
AMAX INC8 citations73
US4328190AMay 4, 1982
Solvent extraction of tungsten from aqueous tungstate solutions
AMAX INC16 citations73
US4311679AJan 19, 1982
Treatment of sodium tungstate leach liquor containing dissolved silica, phosphorus, and fluorine impurities
AMAX INC12 citations73
US4761177AAug 2, 1988
Production of cobalt and nickel powder
AMAX INC9 citations71
US4963336AOct 16, 1990
Purification of APT
AMAX INC11 citations68
US4351808ASep 28, 1982
Autoclave soda digestion of scheelite concentrates
AMAX INC5 citations62
US4342728AAug 3, 1982
Process for digesting tungsten ores containing organic matter
AMAX INC3 citations62
US4325919AApr 20, 1982
Autoclave soda digestion of scheelite concentrates with feedback control
AMAX INC6 citations62
US4320096AMar 16, 1982
Combined autoclave soda digestion of wolframite and scheelite
AMAX INC3 citations62
US4320095AMar 16, 1982
Autoclave soda digestion of refractory scheelite concentrates
AMAX INC4 citations62
US4313914AFeb 2, 1982
Autoclave tungstate upgrading of scheelite concentrates
AMAX INC3 citations62
US4303623ADec 1, 1981
Separation of trace molybdenum from tungstate solutions
AMAX INC3 citations62
US4303622ADec 1, 1981
Chemical treatment of low-grade wolframite concentrate having high Mo/WO3 ratio
AMAX INC6 citations62
US4504448AMar 12, 1985
Activated carbon adsorption of flotation reagents from tungsten solutions
AMAX INC4 citations59
US4490339ADec 25, 1984
Process for recovering tungsten from MoS3 /WS3 precipitates
AMAX INC5 citations59
US4917726AApr 17, 1990
Chromium recovery process
AMAX INC6 citations54
US4810303AMar 7, 1989
Production of hexagonal cadmium sulfide pigment
AMAX INC1 citations51
US4338287AJul 6, 1982
Process for conditioning tungsten concentrates
AMAX INC1 citations51