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3511886
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Patent number 3,511,886
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Issue date May 12, 1970
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C07 - ORGANIC CHEMISTRY
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3499052
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Patent number 3,499,052
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Issue date Mar 3, 1970
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C07 - ORGANIC CHEMISTRY
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3321540
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Patent number 3,321,540
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Issue date May 23, 1967
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C07 - ORGANIC CHEMISTRY
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3281487
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Patent number 3,281,487
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Issue date Oct 25, 1966
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C07 - ORGANIC CHEMISTRY
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2752296
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Patent number 2,752,296
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Issue date Jun 26, 1956
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C07 - ORGANIC CHEMISTRY
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2507506
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Patent number 2,507,506
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Issue date May 16, 1950
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C07 - ORGANIC CHEMISTRY
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2072867
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Patent number 2,072,867
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Issue date Mar 9, 1937
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C07 - ORGANIC CHEMISTRY