Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6194494 | Stabiliser combinations for chlorine-containing polymers | Wolfgang Wehner, Hans-Helmut Friedrich, Kornelia Malzacher, Rolf Drewes | 2001-02-27 |
| 5925696 | Stabilizer combinations for chlorine-containing polymers | Wolfgang Wehner, Hans-Helmut Friedrich, Kornelia Malzacher, Rolf Drewes | 1999-07-20 |
| 5344992 | Process for the preparation of linear 1,3-diketones | Rolf Drewes, Hans-Helmut Friedrich, Bernd Braun, Walter Wecht | 1994-09-06 |
| 5328769 | Gold(I) mercaptocarboxylic acid esters, method of their preparation and use | Marion Lotze | 1994-07-12 |
| 5312480 | Gold(I) mercaptocarboxylic acid esters, method of their preparation and use | Marion Lotze | 1994-05-17 |
| 5235079 | Gold(I) mercaptocarboxylic acid esters, method of their preparation and use | Marion Lotze | 1993-08-10 |
| 4992098 | Glossy, precious-metal preparations for microwave-resistant tableware-decorations | Marion Lotze, Peter Kleinschmit | 1991-02-12 |