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Particulate ceramic useful as a proppant
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Patent number 4,944,905
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Issue date Jul 31, 1990
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Minnesota Mining and Manufacturing Company
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James L. Gibb
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Novolac coated ceramic particulate
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Patent number 4,923,714
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Issue date May 8, 1990
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Minnesota Mining and Manufacturing Company
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James L. Gibb
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Epoxy novolac coated ceramic particulate
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Patent number 4,869,960
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Issue date Sep 26, 1989
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Minnesota Mining and Manufacturing Company
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James L. Gibb
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Particulate ceramic useful as a proppant
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Patent number 4,680,230
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Issue date Jul 14, 1987
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Minnesota Mining and Manufacturing Company
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James L. Gibb
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES