Aki Hannu Vilpponen

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Karhula, FI

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Patents Grantslast 30 patents

Information Patent Grant
Pretreatment of chips before cooking
- Patent number 6,544,384
- Issue date Apr 8, 2003
- Andritz Inc.
- Kaj O. Henricson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Pretreatment of chips before cooking
- Patent number 6,506,283
- Issue date Jan 14, 2003
- Andritz Inc.
- Kaj O. Henricson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Pretreatment of chips before cooking
- Patent number 6,248,208
- Issue date Jun 19, 2001
- Andritz-Ahlstrom Inc.
- Kaj O. Henricson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Cooking cellulose material with high alkali concentrations and/or h...
- Patent number 5,635,026
- Issue date Jun 3, 1997
- Ahlstrom Machinery Inc.
- Auvo K. Kettunen
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method of intensifying the washing of a fiber suspension
- Patent number 4,971,658
- Issue date Nov 20, 1990
- A. Ahlstrom Corporation
- Kaj Henricson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Patents Applicationslast 30 patents

Information Patent Application
Pretreatment of chips before cooking
- Publication number 20020017370
- Publication date Feb 14, 2002
- ANDRITZ-AHLSTROM INC.
- Kaj O. Henricson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Pretreatment of chips before cooking
- Publication number 20010013398
- Publication date Aug 16, 2001
- Kamyr, Inc.
- Kaj O. Henricson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE