Rolf Ryham

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Sollentuna, SE

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Patents Grantslast 30 patents

Information Patent Grant
Method for evaporation of spent liquor
- Patent number 4,789,428
- Issue date Dec 6, 1988
- Ahlstromforetagen Svenska AB
- Rolf Ryham
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method and apparatus for deactivating spent liquor
- Patent number 4,755,258
- Issue date Jul 5, 1988
- Ahlstromforetagen Svenska AB
- Rolf Ryham
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE