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Centrifugal separator
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Patent number 5,281,398
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Issue date Jan 25, 1994
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A. Ahlstrom Corporation
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Timo Hyppanen
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Fluidized bed reactor
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Patent number 4,932,363
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Issue date Jun 12, 1990
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A. Ahlstrom Corporation
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Reijo J. Kuivalainen
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B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
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Fluidized bed reactor
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Patent number RE33230
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Issue date Jun 12, 1990
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A. Ahlstrom Corporation
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Folke Engstrom
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110 - Furnaces
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Fluidized bed reactor
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Patent number 4,864,944
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Issue date Sep 12, 1989
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A. Ahlstrom Corporation
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Folke Engstrom
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Fluidized bed reactor
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Patent number 4,753,177
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Issue date Jun 28, 1988
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A. Ahlstrom Corporation
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Folke Engstrom
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL