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3845119
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Patent number 3,845,119
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Issue date Oct 29, 1974
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C07 - ORGANIC CHEMISTRY
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3804891
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Patent number 3,804,891
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Issue date Apr 16, 1974
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C07 - ORGANIC CHEMISTRY
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2705243
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Patent number 2,705,243
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Issue date Mar 29, 1955
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C07 - ORGANIC CHEMISTRY
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2268347
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Patent number 2,268,347
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Issue date Dec 30, 1941
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C07 - ORGANIC CHEMISTRY