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TitleDateType
26 Process for upgrading tar sand bitumen1989-02-14
27 Process for recovery of solvent from tar sand bitumen1985-07-30
28 Process and apparatus for separating tar from a tar sand mixture1981-02-10
29 Process for recovering bitumen from tar sand1980-12-02
30 Process for recovering products from tar sand1983-10-11
31 Process and apparatus for separating coarse sand particles and recovering bitumen from tar sands1978-10
32 Process for recovering hydrocarbons and heavy minerals from a tar sand hot water process waste stream1976-11-09
33 Process for secondary recovery of bitumen in hot water extraction of tar sand1979-10-23
34 Pour-point depression of crude oils by addition of tar sand bitumen1988-03-03
35 Monitoring surfactant content to control hot water process for tar sand1991-04-23Text
36 Methods of tar sand bitumen recovery1992-09-01Text
37 Method of extracting liquid and gaseous fuel from oil shale and tar sand1981-05-12Text
38 Method of reducing moisture and solid content of bitumen extracted from tar sand minerals2000-02-01Text
39 Method of producing tar sand deposits containing conductive layers1990-05-22Text
40 Method of processing oil-shale or tar sand1982-03-16
41 Method of removing bitumen from tar sand utilizing ultrasonic energy and stirring1977-10-18Text
42 Method of separating bitumen from tar sand with cold solvent1976-11-23Text
43 Method of removing bitumen from tar sand for subsequent recovery of the bitumen1977-10-18Text
44 Method of recovering viscous petroleum from tar sand1976-11-30Text
45 Method for treating a tar sand reservoir to enhance petroleum production by cyclic steam stimulation1986-08-26Text
46 In situ thermal processing of a coal formation using a controlled heating rate2004-06-15
47 In situ thermal processing of a coal formation to produce hydrocarbons having a selected carbon number range2004-06-15
48 Method of recovering viscous petroleum from thick tar sand1977-02-22Text
49 Method of recovery of bitumen from tar sand formations1977-01-18Text
50 Method for recovering bitumen from tar sand1982-05-25Text
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