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3424775
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Patent number 3,424,775
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Issue date Jan 28, 1969
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C07 - ORGANIC CHEMISTRY
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3251871
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Patent number 3,251,871
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Issue date May 17, 1966
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C07 - ORGANIC CHEMISTRY
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3198818
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Patent number 3,198,818
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Issue date Aug 3, 1965
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C07 - ORGANIC CHEMISTRY
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3198819
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Patent number 3,198,819
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Issue date Aug 3, 1965
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C07 - ORGANIC CHEMISTRY
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2718522
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Patent number 2,718,522
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Issue date Sep 20, 1955
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C07 - ORGANIC CHEMISTRY