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last 30 patents
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Patent Grant
Batch process for preparing kraft pulp in a batch digesting process
Patent number
5,643,410
Issue date
Jul 1, 1997
Sunds Defibrator Rauma Oy
Seppo T. Hiljanen
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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Patent Grant
Process for preparing kraft pulp using black liquor pretreatment re...
Patent number
5,183,535
Issue date
Feb 2, 1993
Sunds Defibrator Rauma Oy
Panu Tikka
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE