Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9347007 | Microcrystalline paraffin, method for producing microcrystalline paraffins, and use of the microcrystalline paraffins | Helmuth Schulze-Trautmann, Michael Matthai, Thorsten Butz | 2016-05-24 |
| 7875166 | Microcrystalline paraffin | Michael Matthai, Helmuth Schulze-Trautmann, Thorsten Butz | 2011-01-25 |
| 6913416 | Bitumen or asphalt for the production of road surfaces, road surfaces, and method for the preparation of bitumen or asphalt | Ferdinand Richter, Michael Matthai, Bruno Iversen, Klaus-Werner Damm | 2005-07-05 |
| 6588974 | Bitumen or asphalt for producing a road topping, road topping and method for the production of bitumen or asphalt | Ferdinand Richter, Michael Matthai, Bruno Iversen, Klaus-Werner Damm | 2003-07-08 |
| 6227285 | Heat storage medium | Michael Matthai, Norbert Matzat, Rolf Laudi, Klaus Fieback, Wolfgang Ahrens +1 more | 2001-05-08 |
| 5896914 | Heater | Klaus Fieback, Lutz Kutzker, Thomas Kramer, Michael Matthai | 1999-04-27 |