Nils-Erik Virkola

Person

Helsinki, FI

People

Patents Grantslast 30 patents

Information Patent Grant
Process for the production of a hemicellulose hydrolysate and speci...
- Patent number 5,139,617
- Issue date Aug 18, 1992
- Suomen Sokeri Oy
- Panu O. Tikka
- C13 - SUGAR INDUSTRY
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
Information Patent Grant
Method of decreasing black liquor viscosity
- Patent number 4,929,307
- Issue date May 29, 1990
- A. Ahlstrom Corporation
- Erkki J. Kiiskila
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method of controlling alkaline pulping process
- Patent number 4,895,618
- Issue date Jan 23, 1990
- Afora OY
- Panu Tikka
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method of determining rapidly the concentration of the total sulphu...
- Patent number 4,889,593
- Issue date Dec 26, 1989
- Oy Advanced Forest Automation Ab
- Panu Tikka
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for controlling sulphite pulping and hydrolytic processes by...
- Patent number 4,842,689
- Issue date Jun 27, 1989
- Oy Advanced Forest Automation Ab
- Panu O. Jikka
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for rapid determination of the contents of lignin, monosacch...
- Patent number 4,718,979
- Issue date Jan 12, 1988
- Oy Advanced Forest Automation Ab
- Panu Tikka
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Alkaline sulfite pulping process with sodium aluminate and anthraqu...
- Patent number 4,384,921
- Issue date May 24, 1983
- A. Ahlstrom Osakeyhtio
- Soile H. Pihlajamaki
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Nils-Erik Virkola

Person

Patents Grantslast 30 patents

Process for the production of a hemicellulose hydrolysate and speci...

Method of intensifying the washing of a fiber suspension

Method of decreasing black liquor viscosity

Method of controlling alkaline pulping process

Method of determining rapidly the concentration of the total sulphu...

Method for controlling sulphite pulping and hydrolytic processes by...

Method for rapid determination of the contents of lignin, monosacch...

Alkaline sulfite pulping process with sodium aluminate and anthraqu...