Inventor
WELCH MELVIN B
US22 patents
Patents
22 patentsUS4297460AOct 27, 1981
Treatment of silica
PHILLIPS PETROLEUM CO55 citations96
US4248735AFeb 3, 1981
Treatment of silica
PHILLIPS PETROLEUM CO101 citations96
US4247421AJan 27, 1981
Activation of supported chromium oxide catalysts
PHILLIPS PETROLEUM CO117 citations96
US4182815AJan 8, 1980
Reduction and reoxidation of cogel or self-reduced catalyst
PHILLIPS PETROLEUM CO67 citations96
US4151122AApr 24, 1979
Reduction and reoxidation of cogel or self-reduced catalyst
PHILLIPS PETROLEUM CO130 citations96
US4326988AApr 27, 1982
Catalyst, method of producing the catalyst, and polymerization process employing the catalyst
PHILLIPS PETROLEUM CO34 citations92
US4307214ADec 22, 1981
SC2 activation of supported chromium oxide catalysts
PHILLIPS PETROLEUM CO51 citations92
US4277587AJul 7, 1981
Sulfiding and reoxidation of chromium catalyst
PHILLIPS PETROLEUM CO30 citations92
US4211863AJul 8, 1980
Polymer slurry catalyst residue deactivation
PHILLIPS PETROLEUM CO40 citations92
US4177162ADec 4, 1979
Sulfiding and reoxidation of chromium catalyst
PHILLIPS PETROLEUM CO37 citations92
US4234710ANov 18, 1980
Catalyst and a polymerization process employing the catalyst
PHILLIPS PETROLEUM CO26 citations81
US4410451AOct 18, 1983
Catalyst and process
PHILLIPS PETROLEUM CO8 citations74
US4295997AOct 20, 1981
SO2 Activation of supported chromium oxide catalysts
PHILLIPS PETROLEUM CO7 citations74
US4284748AAug 18, 1981
Olefin polymerization
PHILLIPS PETROLEUM CO14 citations74
US4243552AJan 6, 1981
Polymerization catalyst and process
PHILLIPS PETROLEUM CO20 citations74
US4410671AOct 18, 1983
Catalyst, method of producing the catalyst, and polymerization process employing the catalyst
PHILLIPS PETROLEUM CO8 citations73
US4331791AMay 25, 1982
Polymerization process using high molecular weight epoxides
PHILLIPS PETROLEUM CO13 citations73
US4472523ASep 18, 1984
Zirconium-titanium catalyzed olefin polymerization
PHILLIPS PETROLEUM CO4 citations63
US4396747AAug 2, 1983
Zirconium-titanium catalyzed olefin polymerization
PHILLIPS PETROLEUM CO2 citations63
US4331558AMay 25, 1982
Polymerization catalyst and process
PHILLIPS PETROLEUM CO4 citations63
US4316818AFeb 23, 1982
Polymerization catalyst and process
PHILLIPS PETROLEUM CO2 citations63
US4238369ADec 9, 1980
Chromium-silica catalysts by hydrothermal treating
PHILLIPS PETROLEUM CO4 citations62