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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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3764571
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Patent number 3,764,571
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Issue date Oct 9, 1973
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C07 - ORGANIC CHEMISTRY
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3681461
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Patent number 3,681,461
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Issue date Aug 1, 1972
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C07 - ORGANIC CHEMISTRY
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3673176
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Patent number 3,673,176
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Issue date Jun 27, 1972
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C07 - ORGANIC CHEMISTRY
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3557098
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Patent number 3,557,098
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Issue date Jan 19, 1971
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C07 - ORGANIC CHEMISTRY
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3085118
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Patent number 3,085,118
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Issue date Apr 9, 1963
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C07 - ORGANIC CHEMISTRY