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3037998
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Patent number 3,037,998
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Issue date Jun 5, 1962
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C07 - ORGANIC CHEMISTRY
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3027411
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Patent number 3,027,411
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Issue date Mar 27, 1962
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C07 - ORGANIC CHEMISTRY
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1551176
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Patent number 1,551,176
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Issue date Aug 25, 1925
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C07 - ORGANIC CHEMISTRY
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1456702
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Patent number 1,456,702
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Issue date May 29, 1923
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C07 - ORGANIC CHEMISTRY
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1400247
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Patent number 1,400,247
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Issue date Dec 13, 1921
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C07 - ORGANIC CHEMISTRY