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TitleDateType
51 Process for separating high viscosity bitumen from tar sands1984-12-04
52 Process for upgrading tar sand bitumen1989-02-14
53 Process to separate bituminous material from sand (tar sands)1982-08-03
54 Production of bitumen from a tar sand formation1976-05-25
55 Recovering hydrocarbons from tar sand or heavy oil reservoirs1994-06-07
56 Recovering viscous petroleum from thick tar sand1976-11-30
57 Recovery of bitumen from tar sand1981-02-10
58 Recovery of heavy crude oil or tar sand oil or bitumen from underground formations1992-09-08
59 Recovery of heavy crude oil or tar sand oil or bitumen from underground formations1989-07-11
60 Recovery of petroleum from viscous asphaltic petroleum containing formations including tar sand deposits1977-08-16
61 Recycle of secondary froth in the hot water process for extracting bitumen from tar sand1988-10-11
62 Separation of bitumen from dry tar sands1978-10-17
63 Separation of solids from tar sands extract1978-06-13
64 Simultaneous upgrading of tar sand bitumen and coal by corefining1988-08-16
65 Solvent extraction of tar sand1979-02-13
66 Solvent extraction process for recovering bitumen from tar sand1987-06-30
67 Supercritical tar sand extraction1982-07-27
68 System for handling the underflow from a primary separation vessel in the tar sand hot water process1978-08-08
69 System for recovering viscous petroleum from thick tar sand1977-04-26
70 Tar sand processing apparatus1976-04-20
71 Tar sand production using thermal stimulation1985-04-02
72 Thermal drainage process for recovering hot water-swollen oil from a thick tar sand1987-05-26
73 Treatment of primary tailings and middlings from the hot water extraction process for recovering bitumen from tar sand1985-10-08
74 Use of a submersible viscometer in the primary separation step of the hot water process for recovery of bitumen from tar sand1987-01-20Text
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