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Process for producing bitumen
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Patent number 5,083,613
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Issue date Jan 28, 1992
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Canadian Occidental Petroleum, Ltd.
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Armand A. Gregoli
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E21 - EARTH DRILLING MINING
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Fluidized bed hydroretorting of oil shale
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Patent number 4,075,081
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Issue date Feb 21, 1978
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Cities Service Company
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Armand A. Gregoli
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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Oil shale retorting
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Patent number 3,972,801
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Issue date Aug 3, 1976
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Cities Service Research & Development Co.
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Armand A. Gregoli
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...