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3583977
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Patent number 3,583,977
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Issue date Jun 8, 1971
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C07 - ORGANIC CHEMISTRY
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3528988
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Patent number 3,528,988
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Issue date Sep 15, 1970
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C07 - ORGANIC CHEMISTRY
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3484413
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Patent number 3,484,413
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Issue date Dec 16, 1969
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3434982
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Patent number 3,434,982
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Issue date Mar 25, 1969
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C07 - ORGANIC CHEMISTRY
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3288733
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Patent number 3,288,733
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Issue date Nov 29, 1966
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3271411
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Patent number 3,271,411
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Issue date Sep 6, 1966
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C07 - ORGANIC CHEMISTRY
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3262941
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Patent number 3,262,941
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Issue date Jul 26, 1966
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C07 - ORGANIC CHEMISTRY