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Patents Grants
last 30 patents
Information
Patent Grant
Bioreactor
Patent number
4,514,297
Issue date
Apr 30, 1985
Osakeyhtio; A. Ahlstrom
Johan R. Enqvist
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Extended nip press with movable sealing strips
Patent number
4,492,611
Issue date
Jan 8, 1985
Osakeyhtio; A. Ahlstrom
Paul O. Meinander
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Circular saw blade
Patent number
4,240,315
Issue date
Dec 23, 1980
Osakeyhtio; A. Ahlstrom
Jorma Tuomaala
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Process for recovering chemicals from the waste liquors of sulfate...
Patent number
4,093,508
Issue date
Jun 6, 1978
Osakeyhtio; A. Ahlstrom
Kaj Olof Henricson
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Delignification and bleaching of wood pulp with oxygen in the prese...
Patent number
3,951,732
Issue date
Apr 20, 1976
Osakeyhtio; A. Ahlstrom
Eero Vilhelm Sjostrom
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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last 30 patents
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