Pertti Purolainen

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Patents Grantslast 30 patents

Information Patent Grant
Refining element
- Patent number 7,513,451
- Issue date Apr 7, 2009
- Metso Paper, Inc.
- Nils Virving
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Refining element of a disc refiner
- Patent number 5,526,992
- Issue date Jun 18, 1996
- Sunds Defibrator Industries Aktiebolag
- Anders Hawen
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Patents Applicationslast 30 patents

Information Patent Application
Refining element
- Publication number 20070095962
- Publication date May 3, 2007
- Metso Paper, Inc.
- Nils Virving
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE