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3864216
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Patent number 3,864,216
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Issue date Feb 4, 1975
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C07 - ORGANIC CHEMISTRY
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3475287
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Patent number 3,475,287
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Issue date Oct 28, 1969
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3405035
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Patent number 3,405,035
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Issue date Oct 8, 1968
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3405036
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Patent number 3,405,036
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Issue date Oct 8, 1968
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3320158
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Patent number 3,320,158
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Issue date May 16, 1967
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2807156
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Patent number 2,807,156
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Issue date Sep 24, 1957
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C07 - ORGANIC CHEMISTRY