Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4666618 | Preparation and use of sulphur-containing polyether-urethanes | Karl-Heinz Hentschel, Siegfried Kussi | 1987-05-19 |
| 4603738 | Process and means for preventing blockages of crude oil deposits by the formation of emulsion due to deposits of asphalt | Wolfgang Oberkirch, Armand de Montigny | 1986-08-05 |