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3745067
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Patent number 3,745,067
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Issue date Jul 10, 1973
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C01 - INORGANIC CHEMISTRY
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3226298
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Patent number 3,226,298
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Issue date Dec 28, 1965
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C01 - INORGANIC CHEMISTRY
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3053644
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Patent number 3,053,644
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Issue date Sep 11, 1962
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C01 - INORGANIC CHEMISTRY
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3033652
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Patent number 3,033,652
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Issue date May 8, 1962
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C01 - INORGANIC CHEMISTRY