Frank Doppenberg

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Lausanne, CH

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Patents Grantslast 30 patents

Information Patent Grant
Method for preparing alkaline solutions containing aromatic polymers
- Patent number 6,239,198
- Issue date May 29, 2001
- Granit S.A.
- Alfred Abächerli
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Production of pulp by the soda-anthraquinone process (SAP) with rec...
- Patent number 5,595,628
- Issue date Jan 21, 1997
- Grant S.A.
- Otto W. Gordon
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE