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Bleaching of pulp
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Patent number 8,920,603
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Issue date Dec 30, 2014
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Akzo Nobel N.V.
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Magnus Björklund
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3919041
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Patent number 3,919,041
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Issue date Nov 11, 1975
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3907632
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Patent number 3,907,632
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Issue date Sep 23, 1975
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3802958
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Patent number 3,802,958
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Issue date Apr 9, 1974
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3698995
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Patent number 3,698,995
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Issue date Oct 17, 1972
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3652387
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Patent number 3,652,387
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Issue date Mar 28, 1972
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3632469
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Patent number 3,632,469
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Issue date Jan 4, 1972
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3617432
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Patent number 3,617,432
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Issue date Nov 2, 1971
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3591451
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Patent number 3,591,451
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Issue date Jul 6, 1971
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3560330
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Patent number 3,560,330
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Issue date Feb 2, 1971
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3501374
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Patent number 3,501,374
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Issue date Mar 17, 1970
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3433702
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Patent number 3,433,702
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Issue date Mar 18, 1969
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE