Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674359 | Continuous cooking of cellulosic fibrous material with cold alkali impregnation | R. Fred Chasse, Kaj Henricson | 1997-10-07 |
| 5662775 | Continuous digester with dissolved solids handling | J. Robert Prough, Richard O. Laakso, R. Fred Chasse | 1997-09-02 |
| 5635026 | Cooking cellulose material with high alkali concentrations and/or high pH | Auvo Kettunen, Kaj Henricson, Aki Vilpponen, Jian E. Jiang | 1997-06-03 |
| 5620562 | Dissolved solids control in pulp production | J. Robert Prough, Richard O. Laakso, Joseph R. Phillips, Rolf Ryham, Jan T. Richardsen +1 more | 1997-04-15 |