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Anaerobic filter
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Patent number 4,568,464
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Issue date Feb 4, 1986
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Celanese Corporation
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George A. Blay
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G05 - CONTROLLING REGULATING
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Anaerobic treatment
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Patent number 4,415,453
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Issue date Nov 15, 1983
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Celanese Corporation
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Enrique R. Witt
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Anaerobic treatment
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Patent number 4,366,059
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Issue date Dec 28, 1982
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Celanese Corporation
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Enrique R. Witt
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Anaerobic filter
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Patent number 4,352,738
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Issue date Oct 5, 1982
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Celanese Corporation
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George A. Blay
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G05 - CONTROLLING REGULATING
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Biological filter and process
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Patent number 4,351,729
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Issue date Sep 28, 1982
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Celanese Corporation
-
Enrique R. Witt
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Anaerobic treatment
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Patent number 4,315,823
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Issue date Feb 16, 1982
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Celanese Corporation
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Enrique R. Witt
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE