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3759955
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Patent number 3,759,955
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Issue date Sep 18, 1973
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C07 - ORGANIC CHEMISTRY
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3480676
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Patent number 3,480,676
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Issue date Nov 25, 1969
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C07 - ORGANIC CHEMISTRY
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3271420
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Patent number 3,271,420
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Issue date Sep 6, 1966
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C07 - ORGANIC CHEMISTRY
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2856310
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Patent number 2,856,310
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Issue date Oct 14, 1958
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C07 - ORGANIC CHEMISTRY
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2806064
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Patent number 2,806,064
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Issue date Sep 10, 1957
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C07 - ORGANIC CHEMISTRY
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2184963
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Patent number 2,184,963
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Issue date Dec 26, 1939
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C07 - ORGANIC CHEMISTRY