Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10807023 | Method for the treatment of water and wastewater | — | 2020-10-20 |
| 8852434 | Filter element for a disc filter | Kjell Gustafsson | 2014-10-07 |
| D606621 | Filter element | Kjell Gustafsson | 2009-12-22 |
| 6899231 | Settling device | — | 2005-05-31 |
| 6426005 | Sequential descending bed filters with reject/washwater containing impurities being fed to a separate unit for elimination of impurities | — | 2002-07-30 |
| 5698106 | Filtration process and apparatus | Ulf R. Hjelmner, Sven Hakansson | 1997-12-16 |
| 4400280 | Method and apparatus for supplying distributing composite liquids to a laminar separation apparatus | Sven Hakansson | 1983-08-23 |
| 4246102 | Method for separating pollutants from liquid | Ulf R. Hjelmner | 1981-01-20 |
| 4197201 | Apparatus for the filtration of a suspension or emulsion | Ulf R. Hjelmner | 1980-04-08 |