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3897479
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Patent number 3,897,479
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Issue date Jul 29, 1975
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C07 - ORGANIC CHEMISTRY
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2949354
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Patent number 2,949,354
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Issue date Aug 16, 1960
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C07 - ORGANIC CHEMISTRY
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2519983
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Patent number 2,519,983
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Issue date Aug 22, 1950
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C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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2240275
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Patent number 2,240,275
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Issue date Apr 29, 1941
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C07 - ORGANIC CHEMISTRY