Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6030492 | Impregnation of cellulose-containing material with black liquor in a single vessel digester | Lennart Sjolund | 2000-02-29 |
| 5827401 | Screen system for a continuous digester | Ake Backlund, Kenneth Bellstrom, Johanna Svanberg, Soren Soderqvist | 1998-10-27 |
| 5658428 | Method for impregnation in a single-vessel hydraulic digester | — | 1997-08-19 |
| 5591303 | Process for operating a digester | Ake Backlund, Johanna Svanberg | 1997-01-07 |
| 5567280 | Digester for cooking pulp having staggered circular screens for isothermal cooking | Ake Backlund, Kenneth Bellstrom, Johanna Svanberg, Soren Soderqvist | 1996-10-22 |
| 5470437 | Digester for cooking pulp having staggered screens | Ake Backlund, Johanna Svanberg | 1995-11-28 |
| 5407103 | Apparatus for discharging particle material | Bo Clarstrom, Lennart Jonsson | 1995-04-18 |