Per H. Ostman

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Jorvas, FI

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Patents Grantslast 30 patents

Information Patent Grant
Process for causticizing of an aqueous solution containing alkali c...
- Patent number 4,894,217
- Issue date Jan 16, 1990
- Ekono Oy
- Per H. Ostman
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for the impregnation and cooking of lignocellulosic material...
- Patent number 4,764,251
- Issue date Aug 16, 1988
- Ekono Oy
- Per Hakan Ostman
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for continuous digestion of finely-divided material with he...
- Patent number 4,608,121
- Issue date Aug 26, 1986
- Ekono Oy
- Per H. Ostman
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE