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Alumina wellbore cement composition
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Patent number 5,488,991
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Issue date Feb 6, 1996
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Shell Oil Company
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Kenneth M. Cowan
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Anti gas-migration cementing
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Patent number 5,370,181
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Issue date Dec 6, 1994
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Shell Oil Company
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James J. W. Nahm
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Blast furnace slag spacer
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Patent number 5,316,083
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Issue date May 31, 1994
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Shell Oil Company
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James J. W. Nahm
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Directional drilling plug
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Patent number 5,314,031
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Issue date May 24, 1994
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Shell Oil Company
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Arthur H. Hale
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Blast furnace slag transition fluid
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Patent number 5,305,831
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Issue date Apr 26, 1994
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Shell Oil Company
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James J. W. Nahm
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Well drilling cuttings disposal
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Patent number 5,277,519
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Issue date Jan 11, 1994
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Shell Oil Company
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James J. W. Nahm
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Drilling fluids
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Patent number 3,956,140
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Issue date May 11, 1976
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Dresser Industries, Inc.
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James Jang Woo Nahm
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...