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3682310
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Patent number 3,682,310
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Issue date Aug 8, 1972
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3398832
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Patent number 3,398,832
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Issue date Aug 27, 1968
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3356219
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Patent number 3,356,219
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Issue date Dec 5, 1967
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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1630274
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Patent number 1,630,274
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Issue date May 31, 1927
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL