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3759868
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Patent number 3,759,868
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Issue date Sep 18, 1973
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3597404
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Patent number 3,597,404
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Issue date Aug 3, 1971
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3114741
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Patent number 3,114,741
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Issue date Dec 17, 1963
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3065214
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Patent number 3,065,214
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Issue date Nov 20, 1962
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...