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3681488
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Patent number 3,681,488
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Issue date Aug 1, 1972
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3404133
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Patent number 3,404,133
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Issue date Oct 1, 1968
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3206422
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Patent number 3,206,422
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Issue date Sep 14, 1965
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3180906
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Patent number 3,180,906
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Issue date Apr 27, 1965
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3081244
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Patent number 3,081,244
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Issue date Mar 12, 1963
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...