Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8002994 | Method and apparatus for thickening lime mud in a disc filter | Holger Engdahl, Markku Lankinen, Antti Mattelmäki, Simo Suutari, Mika Kottila | 2011-08-23 |
| 6074521 | Method of separating impurities from lime and lime sludge | Holgor Engdahl, Kurt Siren, Juhani Vehmaan-Kreula, Pasi Vanttinen | 2000-06-13 |
| 5735331 | Method and apparatus for regulating the temperature in a chemical melt dissolving tank | Holger Engdahl | 1998-04-07 |