Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5639347 | Method of controlling of metals in a bleach plant, using oxidation | — | 1997-06-17 |
| 5628874 | Reduction of chloride in pulping chemical recovery systems | Birgitta Sundblad | 1997-05-13 |