-
-
3741947
-
Patent number 3,741,947
-
Issue date Jun 26, 1973
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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2839517
-
Patent number 2,839,517
-
Issue date Jun 17, 1958
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...