Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10022759 | Method for refining of in power plants produced coal ash and coal containing ashes produced in other combustion processings | Jouko Niemi | 2018-07-17 |
| 9278358 | Method for refining coal ash by separating carbonous product and regenerating siliceous ash products and use of a carbonous product produced by the method | Jouko Niemi | 2016-03-08 |