Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6531533 | Stabilized halogen-containing polymers | Karl-Josef Kuhn, Wolfgang Wehner | 2003-03-11 |
| 6310128 | Halogen-containing polymers provided with an antistatic agent | Bruno Hilti, Ernst Minder, Jurgen Pfeiffer | 2001-10-30 |
| 6194494 | Stabiliser combinations for chlorine-containing polymers | Wolfgang Wehner, Hans-Helmut Friedrich, Kornelia Malzacher, Hans Mehner | 2001-02-27 |
| 6174941 | NH2-modified 6-aminouracils as stabilizers for halogenated polymers | Wolfgang Wehner, Hans-Helmut Friedrich | 2001-01-16 |
| 6002004 | Pyrrolodiazine derivatives as stabilizers for chilorine-containing polymers | Wolfgang Wehner, Hans-Helmut Friedrich | 1999-12-14 |
| 5985964 | Stabilized polyvinyl chloride containing recycled material | Heinz Herbst, Kurt Hoffmann, Rudolf Pfaendner | 1999-11-16 |
| 5925696 | Stabilizer combinations for chlorine-containing polymers | Wolfgang Wehner, Hans-Helmut Friedrich, Kornelia Malzacher, Hans Mehner | 1999-07-20 |
| 5859100 | Rigid PVC stabilised with N,N-dimethyl-6-aminouracils | Wolfgang Wehner, Hans-Helmut Friedrich, Kornelia Malzacher | 1999-01-12 |
| 5770643 | Pyrrolodiazine derivatives as stabilizers for chlorine-containing polymers | Wolfgang Wehner, Hans-Helmut Friedrich | 1998-06-23 |
| 5543449 | Stabilized flexible PVC | Markus Kolb, Karl-Josef Kuhn, Hans Sander, Wolfgang Wehner | 1996-08-06 |
| 5534566 | Stabilized halogen-containing polymers | Wolfgang Wehner, Karl-Josef Kuhn, Hans Sander, Markus Kolb | 1996-07-09 |
| 5519077 | Stabilized polyvinyl chloride | Markus Kolb, Karl-Josef Kuhn, Hans Sander, Wolfgang Wehner | 1996-05-21 |
| 5492949 | Stabilized polyvinyl chloride | Markus Kolb, Karl-Josef Kuhn, Wolfgang Wehner | 1996-02-20 |
| 5344992 | Process for the preparation of linear 1,3-diketones | Hans-Helmut Friedrich, Hans Mehner, Bernd Braun, Walter Wecht | 1994-09-06 |
| 5322964 | Process for the preparation of alpha-aminoketone salts | Hans-Helmut Friedrich | 1994-06-21 |
| 5288776 | Substituted pyrroles as stabilisers for chlorinated polymers | Hans-Helmut Friedrich | 1994-02-22 |