Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5653861 | Electrochemical process | Johan Landfors | 1997-08-05 |
| 5624545 | Production of polysulphide by electrolysis of white liquor containing sulphide | Johan Landfors, Maria Norell | 1997-04-29 |