Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5973217 | Method for processing recycled or scrap plastics | Horst Hastrich, Christian Hecka, Klaus Niemann, Claus Strecker | 1999-10-26 |
| 5917102 | Device for depolymerizing used and waste plastics | Klaus Niemann, Klaus Strecker, Dieter Ullrich, Christian Hecka | 1999-06-29 |
| 5849964 | Process for the processing of salvaged or waste plastic materials | Klaus Niemann, Martin Rupp | 1998-12-15 |
| 5789636 | Process for recovering synthetic raw materials and fuel components from used or waste plastics | Klaus Niemann, Claus Strecker | 1998-08-04 |
| 4810365 | Hydrogenation of mineral oils contaminated with chlorinated hydrocarbons | Werner Dohler, Klaus Niemann | 1989-03-07 |
| 4512873 | Process for low temperature carbonization of hydrogenation residues | Gert Escher, Hans-Peter Wenning | 1985-04-23 |