Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11725341 | Method of treating fly ash of a recovery boiler | Keijo Salmenoja, Niko Metsämuuronen, Marjukka Joutsimo | 2023-08-15 |
| 11473241 | Method of producing chemical pulp | Janne Vehmaa, Kari Kovasin | 2022-10-18 |
| 10415183 | Method of producing regenerated cellulose and hemicellulose | Esko Turunen | 2019-09-17 |
| 7591988 | Method for processing flue gases | Risto Hämäläinen, Keijo Salmenoja | 2009-09-22 |
| 4481074 | Process for the preparation of a sodium sulphite containing liquor | Arto Vainiotalo, Illmo Yrjala | 1984-11-06 |